GLAUCA B1 FOLDER WITH SHEATH

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ABOUT: The Extrema Ratio GLAUCA B1 is a purpose-built, medium-weight tactical folding knife born from a collaboration between Extrema Ratio and the GIGN (Groupe d'Intervention de la Gendarmerie Nationale)—France’s elite special operations unit. Developed to meet the operational needs of professionals in the field, the GLAUCA B1 blends reliability, innovation, and performance into a uniquely capable folding knife.

BLADE: The GLAUCA B1 features a distinctive canto-style tip, sharpened on both edges—a design that has earned it the nickname "double tanto". Partial serrations add cutting versatility, making it effective in a wide range of tactical and utility roles. It can be deployed using ambidextrous thumb studs or flippers, both of which double as guards to protect your hand. Each flipper includes a lanyard hole.

HANDLE: Designed for maximum control under stress, the handle includes an integrated plastic restraint cutter—ideal for slicing through zip ties or handcuffs—and accessed via a spine lever. The ergonomics ensure a rock-solid grip, even with gloves on. A hardened glass breaker is built into the pommel, and a reversible pocket clip accommodates both left- and right-handed users. Each side of the handle bears a GIGN insignia, emphasizing the knife’s professional pedigree.

LOCK: The GLAUCA B1 uses a robust liner lock for everyday reliability, backed by a manual safety lock for added strength. With both locks engaged, the blade becomes as solid and dependable as a fixed blade, giving users complete confidence during critical tasks.

SHEATH: The Glauca B1 comes with a uniquely engineered sheath designed to carry the knife like a fixed blade. It features a hard ABS structure mounted on a Cordura base, combining durability with flexibility. This hybrid design offers rugged protection for the blade. The sheath supports multiple carry positions, is fully MOLLE compatible, and can be worn on a belt or side-mounted. A leg strap is included for added stability ensuring the knife stays secure and accessible. This sheath system is tough, versatile, and ready.

ADDITIONAL INFORMATON

NOTE: Most Extrema Ratio knives are designed for many purposes except for use with food. While they are known for their versatility, durability and strength, they are not ideal for using with food. For food purposes, it's recommended to use knives specially designed for the task.

ength Opened - Knife Only: mm 270 (10.63 inches)
Length Closed: mm 157 (6.18 inches)
Total Length of Sheath and Inserted Knife: mm 311.15 (12.25 inches)
Blade Length: mm 112 (4.41 inches)
Weight - Knife Only: g 207 (7.28 ounces)
Weight - Knife and Sheath: g 419.57 (14.80 ounces)
Blade Thickness (center of blade): mm 2.81 (0.11 inches)
Blade Width (Widest Section) mm 30.31 (1.19 inches)
Blade Steel: N690 cobalt stainless steel
Blade Hardness: Rockwell 58 HRC
Serrations: Partially serrated blade - mm 22.03 (.087 inches)
Locking System: Liner lock
Handle: Anticorodal aluminum
Clip: Reversible clip on knife
Window Breaker: Yes

ADDITIONAL INFORMATON

NOTE: Most Extrema Ratio knives are designed for many purposes except for use with food. While they are known for their versatility, durability and strength, they are not ideal for using with food. For food purposes, it's recommended to use knives specially designed for the task.