collection knives

The Extrema Ratio Frame Rock is a new knife, based on the Ti-Rock project, a successful frame-lock knife made by Extrema Ratio in 2016 exclusively for Coltelleria Collini.

The Extreme Ratio Frame Rock is characterized by the titanium handle that offers great resistance while being very light. The integrity of the frame-lock locking system is guaranteed against wear by an easily replaceable hardened steel insert.

Unlike its drop-point predecessor, the Rock frame has a spearpoint blade 75 mm long, 6.0 mm thick, equipped with fuller for further lightening. The blade is made of Bohler N690 steel, heat treated to a hardness of 58 HRC. The same is available in black finish with DLC or satin finish.

To make the opening even more fluid and free of uncertainties, the blade rotates on ball bearings. This mechanism allows the user to adjust the force necessary to release the blade from the closed position.

The shape of the reversible clip allows a hidden port in the pocket, making the knife not visible from the outside. The large, solid handle and the well-proportioned blade allow this knife to tackle demanding tasks. Frame Rock weighs less than 200g, making it somewhat light for such a sturdy knife. It is supplied inside an ABS box.

Intended use: collection / CQD

Type of production: industrial
Blade: in N690Co stainless steel
Blade treatment: Black DLC
Country of production: Italy
Handle: in Titanium, machined from solid, with integral Frame Lock closure system with removable hinged and safe made of stainless steel
Blade length: 75mm.
Blade thickness: 6.3mm.
Total length: 181mm.
Weight: 193g.
Clip: stainless steel, reversible, deep pocket type and with tip up port
Notes: Conical Skull Crasher inserted in the shank
Box: in ABS with Extrema Ratio logos

The Extrema Ratio Frame Rock is a new knife, based on the Ti-Rock project, a successful frame-lock knife made by Extrema Ratio in 2016 exclusively for Coltelleria Collini.

The Extreme Ratio Frame Rock is characterized by the titanium handle that offers great resistance while being very light. The integrity of the frame-lock locking system is guaranteed against wear by an easily replaceable hardened steel insert.

Unlike its drop-point predecessor, the Rock frame has a spearpoint blade 75 mm long, 6.0 mm thick, equipped with fuller for further lightening. The blade is made of Bohler N690 steel, heat treated to a hardness of 58 HRC. The same is available in black finish with DLC or satin finish.

To make the opening even more fluid and free of uncertainties, the blade rotates on ball bearings. This mechanism allows the user to adjust the force necessary to release the blade from the closed position.

The shape of the reversible clip allows a hidden port in the pocket, making the knife not visible from the outside. The large, solid handle and the well-proportioned blade allow this knife to tackle demanding tasks. Frame Rock weighs less than 200g, making it somewhat light for such a sturdy knife. It is supplied inside an ABS box.

Intended use: collection / CQD

Type of production: industrial,
Blade: in N690Co stainless steel
Blade treatment: Satin finish
Country of production: Italy
Handle: in Titanium, machined from solid, with integral Frame Lock closure system with removable hinged and safe made of stainless steel
Blade length: 75mm.
Blade thickness: 6.3mm.
Total length: 181mm.
Weight: 193g.
Clip: stainless steel, reversible, deep pocket type and with tip up port
Notes: Conical Skull Crasher inserted in the shank
Box: in ABS with Extrema Ratio logos

KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Type: Previously purchased
* Condition: Like new, never taken out of its packaging.
* Commercially available: Discontinued
* Sharpening: Factory
* Marks on blade: None
* Marks on handle: None
* Box: Present
* Scabbard: /
* Manuals, Certificates and Warranties: Present
* Checked and Certified by our in-house laboratory

Coltelleria Collini exclusive - Available in only 33 numbered examples on blade and box

Intended use: collection / EDC / CQD

Type of production: industrial, limited
Blade: Japanese laminated stainless steel (San Mai) with cryogenically hardened 61.5HRC CoS cutting edge; with double concave shank in the strong of the blade
Blade treatment: satin finish
Country of manufacture: Italy
Handle: made of Titanium, machined from solid, with integral Frame Lock system with removable casement and safety made of stainless steel
Blade length: 75mm.
Blade thickness: 6.3mm.
Total length: 180mm.
Weight: 186g.
Clip: stainless steel, reversible, deep pocket type and with tip up port
Notes: tapered Skull Crasher engaged in the tang - Limited and numbered edition of only 33 pieces serialized on the blade and box
Box: cardboard, numbered, with ExtremaRatio and Coltelleria Collini logos

Reventon knife, no longer in production for years and limited to 2000 pieces, withdrawn from a private collection globally in excellent condition - Complete with everything, plastic box and certificates. Checked and certified by our internal laboratory.

Extrema Ratio was chosen by Automobili Lamborghini to produce the Reventón Folder, an emergency knife, belt cutter and glass breaker, designed by the Lamborghini Style Center, which becomes the official equipment of each of the 20 Reventón produced, the most exclusive supercar of the House of Bull.

The "Reventón Folder" is an accessory of the highest functional and aesthetic level, clearly in line with the philosophy of the car built with concepts and technologies directly borrowed from the most advanced aviation industry.

The knife is produced in a limited edition of 2,000 pieces, the first twenty equip the Reventón, the other 1980 pieces will be available for collectors.

Intended use: Collection

Type of production: Industrial
Production Lama: Italy
Blade: N690Co 58HRC stainless steel
Blade treatment: Testudo
Handle: Anticorodal
Blade length: 120mm.
Blade thickness: 6.3mm.
Closed length: 155mm.
Total length: 260mm.
Thick when closed: 21mm.
Balancing: -
Weight: 235g.
Closure: Back Lock with safety catch
Clip: -
Sheath: -
Packaging: plastic box with Lamborghini and Reventon logos
Notes: Specimen number 297 out of 2000, unique piece at our disposal

Knife withdrawn from a private collection - In like new condition - Never regrind - Checked and certified by our in-house Coltelleria Collini laboratory.

The Extrema Ratio Frame Rock is a new knife, based on the Ti-Rock project, a successful frame-lock knife made by Extrema Ratio in 2016 exclusively for Coltelleria Collini.

The Extreme Ratio Frame Rock is characterized by a titanium handle that offers great resistance while being very light. The integrity of the frame-lock system is guaranteed against wear by an easily replaceable hardened steel insert.

Unlike its drop-point predecessor, the Rock frame has a 75mm long, 6.0mm thick spearpoint blade fitted with a fuller for further lightening. The blade is made of Bohler N690 steel, heat treated to a hardness of 58 HRC. The same is available with a black finish with DLC treatment or satin.

To make opening even more fluid and without uncertainty, the blade rotates on ball bearings. This mechanism allows the user to adjust the force necessary to obtain the release of the blade from the closed position.

The shape of the reversible clip allows a hidden port in the pocket, making the knife not visible from the outside. The large and solid handle and the well-proportioned blade allow this knife to tackle heavy tasks. The Frame Rock weighs less than 200g, making it somewhat light for such a sturdy knife. Comes inside an ABS box.

Intended use: collection / CQD

Type of production: industrial,
Blade: N690Co stainless steel
Blade treatment: Satin finish
Country of production: Italy
Handle: Titanium, machined from solid, with integral Frame Lock closure system with removable flap and safety made of stainless steel
Blade length: 75mm.
Blade thickness: 6.3mm.
Total length: 181mm.
Weight: 193g.
Clip: stainless steel, reversible, deep pocket type and with tip up port
Notes: Conical Skull Crasher inserted in the tang
Box: in ABS with Extrema Ratio logos

Purpose of use: Collection / Sportsman

Type of production: Sprint Run, Industrial, Open Number
Country of production: Prato - Italy
Blade: Coreless Steel VG10 / VG2 61HRC made in Japan by Takefu Steel
Blade treatment: chemical detection
Handle: Anodized aluminum anticorodal
Blade Length: 70mm.
Blade thickness: 2.5mm.
Closed length: 99mm.
Total Length: 168mm.
Closure thickness: 11mm.
Weight: 84g.
Opening: ambidextrous opening pin
Washers: in fiberglass
Closure: Liner Lock
Clip: stainless steel, deep pocket, removable and reversible
Packing: Cardboard box with Extrema Ratio logos - Numbered guarantee certificate
Notes: Limited edition - Each specimen is numbered on the grip and on the internal warranty certificate - Exclusive Product of Coltelleria Collini

ABOUT THE STEEL

More than just a damask, Coreless steel made by Japanese Takefu Steel comes with over 70 layers of VG10 and VG2 stainless steel welded, forged and coated between them so that you can form a lightweight, slim and durable blade with a spectacular damask outer pattern.

The peculiarity of Coreless steel, unlike conventional rolled steel or Japanese San-Mai, is that it does not have a hard core steel that is used for the cutting edge but has both the VG10 and VG2 steels arranged to form the cutting edge so alternating and sequential to each other.

This particular construction gives the blade - compared to the two steels that make it, individually taken - greater resistance to oxidation, higher surface hardness (up to 61.5HRC), 25% more than cutting capacity, 25% more than the wire hold capacity and 25% more resilience making the blade more robust and less subject to breakage.

Thanks to this latest steel, Takefu Steel has been rewarded on Japanese territory for research and development and innovation in the cutting-edge landscape. Coreless steel has already been chosen by major brands such as Kai and Mcusta Zanmai who since 2017 proposed it on their top productions of professional kitchen knives.

Purpose of use: Collection / Sportsman

Type of production: Sprint Run, Industrial, Open Number
Country of production: Prato - Italy
Blade: Coreless Steel VG10 / VG2 61HRC made in Japan by Takefu Steel
Blade treatment: chemical detection
Handle: Anodized aluminum anticorodal
Blade Length: 70mm.
Blade thickness: 2.5mm.
Closed length: 99mm.
Total Length: 168mm.
Closure thickness: 11mm.
Weight: 84g.
Opening: ambidextrous opening pin
Washers: in fiberglass
Closure: Liner Lock
Clip: stainless steel, deep pocket, removable and reversible
Packing: Cardboard box with Extrema Ratio logos - Numbered guarantee certificate
Notes: Limited edition - Each specimen is numbered on the grip and on the internal warranty certificate - Exclusive Product of Coltelleria Collini

ABOUT THE STEEL

More than just a damask, Coreless steel made by Japanese Takefu Steel comes with over 70 layers of VG10 and VG2 stainless steel welded, forged and coated between them so that you can form a lightweight, slim and durable blade with a spectacular damask outer pattern.

The peculiarity of Coreless steel, unlike conventional rolled steel or Japanese San-Mai, is that it does not have a hard core steel that is used for the cutting edge but has both the VG10 and VG2 steels arranged to form the cutting edge so alternating and sequential to each other.

This particular construction gives the blade - compared to the two steels that make it, individually taken - greater resistance to oxidation, higher surface hardness (up to 61.5HRC), 25% more than cutting capacity, 25% more than the wire hold capacity and 25% more resilience making the blade more robust and less subject to breakage.

Thanks to this latest steel, Takefu Steel has been rewarded on Japanese territory for research and development and innovation in the cutting-edge landscape. Coreless steel has already been chosen by major brands such as Kai and Mcusta Zanmai who since 2017 proposed it on their top productions of professional kitchen knives.

Folding knife made upon specific requests of the department of the Italian Army 185 ° RAO ( Target Acquisition Regiment ) and is now included the eponymous department . The knife supplied differs from the calendar for the total lack of writings or logos on the blade.

Limited Edition RAO model characterized by a satin blade in Japanese rolled steel produced by Takefu Steel. to the central plate and the 420J2 (56 HRC) In the specific CoS it is used to 61,5HRC (Cobalt Special deemed superior mechanically by 25% compared to the already appreciated VG10) for the two side plates, in order to have a very high capacity cutting but at the same time a remarkable resilience and resistance to oxidation.
folding knife made upon specific requests of the Italian Department of the Army 185th RAO (Regiment Acquisition Objectives) and currently supplied to the homonymous department. The knife supplied differs from that only civil to the total lack of written or logos on the blade.

Intended Use: Military / Tactical

Type of production: Industrial
Production Lama: Italy
Blade: (San Mai) Japanese-rolled stainless steel with sharp CoS to 61,5HRC in cryogenic tempering
Lama Treatment: Testudo
Handle material: anticorodal 4.5mm
Blade length: 118mm.
Blade Thickness: 6.3mm.
Length closed: 142
Overall length: 261mm.
Balancing: -
Weight: 335g.
Closure: front modified lock - threaded safety pin
Clip: -
Sheath: tactical nylon by Vega with M.O.L.L.E. attacks suitable for both the closed knife that open - color BLACK
Notes: sharpening the included Diamond

A Coltelleria Collini Exclusive - Limited edition, available in only 33 serialized pieces

Intended Use: collection / EDC / CQD

Type of production: Industrial, Limited
Blade: Japanese-rolled stainless steel (San Mai) with sharp CoS to 61,5HRC in cryogenic quenching; with fuller double concave in the strong blade
Blade treatment: Satin finish
Production Country: Italy
Handle: Titanium, Billet, with full Frame Lock locking system with sash and secure removable made of stainless steel
Blade length: 75mm.
Blade Thickness: 6.3mm.
Overall length: 180mm.
Weight: 186g.
Clips: stainless steel, reversible type deep pocket and port tip up
Notes: Skull Crasher tapered shank engaged in - Edition limited and numbered edition in only 33 serialized pieces on the blade and box
Box: cardboard, numbered, with ExtremaRatio logos and Coltelleria Collini

A Coltelleria Collini Exclusive - Limited edition, available in only 33 serialized pieces

Intended Use: collection / EDC / CQD

Type of production: Industrial, Limited
Blade: Japanese-rolled stainless steel (San Mai) with sharp CoS to 61,5HRC in cryogenic quenching; with fuller double concave in the strong blade
Blade treatment: Satin finish
Production Country: Italy
Handle: Titanium, Billet, with full Frame Lock locking system with sash and secure removable made of stainless steel
Blade length: 75mm.
Blade Thickness: 6.3mm.
Overall length: 180mm.
Weight: 186g.
Clips: stainless steel, reversible type deep pocket and port tip up
Notes: Skull Crasher tapered shank engaged in - Edition limited and numbered edition in only 33 serialized pieces on the blade and box
Box: cardboard, numbered, with ExtremaRatio logos and Coltelleria Collini

A Coltelleria Collini Exclusive - Limited edition, available in only 33 serialized pieces

Intended Use: collection / EDC / CQD

Type of production: Industrial, Limited
Blade: Japanese-rolled stainless steel (San Mai) with sharp CoS to 61,5HRC in cryogenic quenching; with fuller double concave in the strong blade
Blade treatment: Satin finish
Production Country: Italy
Handle: Titanium, Billet, with full Frame Lock locking system with sash and secure removable made of stainless steel
Blade length: 75mm.
Blade Thickness: 6.3mm.
Overall length: 180mm.
Weight: 186g.
Clips: stainless steel, reversible type deep pocket and port tip up
Notes: Skull Crasher tapered shank engaged in - Edition limited and numbered edition in only 33 serialized pieces on the blade and box
Box: cardboard, numbered, with ExtremaRatio logos and Coltelleria Collini

Collectors Edition with:

* Box of ABS branded laser
* Tactical Kydex scabbard and leather, handcrafted
* Attack Tek-Lok
* Lanyard black paracord with custom anodized titanium wire stop with slogans and Extrema Ratio Knives Collini

Only two specimens at our disposal: Number 4 of 100 and number 9 of 100

This is a Collini Cutlery Exclusive - Only available in 100 serialized pieces

Intended Use: collection / EDC / CQD
Type of production: industrial, Limited
Blade: N690 stainless steel in 58HRC with hollow ground fuller
Blade Treatment: Black Testudo
Blade Production: Italy
Handle: Titanium machined from solid.
Closing system: Frame Lock with swing and safe removable stainless steel
Blade length: 75mm.
Blade Thickness: 6.3mm.
Overall length: 180mm.
Weight: 190g.
Clips: stainless steel, reversible, deep pocket, tip up
Notes: Conical Skull Crasher engaged in the shank - Limited and serialized edition in only 100 pieces
Box: Cardboard, serialized, with Extrema Ratio and Coltelleria Collini logos

** SOLD OUT - OUT OF STOCK AND OUT OF PRODUCTION ** 

This is a Collini Cutlery Exclusive - Only available in 100 serialized pieces

Intended Use: collection / EDC / CQD
Type of production: industrial, Limited
Blade: N690 stainless steel in 58HRC with hollow ground fuller
Blade Treatment: Black Testudo
Blade Production: Italy
Handle: Titanium machined from solid.
Closing system: Frame Lock with swing and safe removable stainless steel
Blade length: 75mm.
Blade Thickness: 6.3mm.
Overall length: 180mm.
Weight: 190g.
Clips: stainless steel, reversible, deep pocket, tip up
Notes: Conical Skull Crasher engaged in the shank - Limited and serialized edition in only 100 pieces
Box: Cardboard, serialized, with Extrema Ratio and Coltelleria Collini logos