Extrema Ratio Ferrum Rescue Linerlock Black EX0365BLKBLK. 5" (11.43cm) closed. 2.25" (5.72cm) Bohler N690 stainless blade. Black anodized aluminum handle. Glass breaker. Pocket clip. Extended tang. The first and main blade is 3mm thick. It is designed for heavy use and to prevent the edges of the other two blades from wearing prematurely. Its serration allows it to cut bigger ropes or textiles whereas the plain edge acts as a proper knife. The second blade is a scalpel which can be used to make extremely clear cuts and perform emergency actions. The third and the smallest located on the back of the main blade is a lanyard cutter that can also be employed to cut aramid paracords. Boxed. Specifications for Extrema Ratio Ferrum Rescue Linerlock Black: Manufacturer: Extrema Ratio Blade Length: 56 mm Closed Length: 4.5 in Blade Material: Bohler N690 Stainless Steel Serrated: Partially Serrated Knife Application: Rescue Overall Length: 170 mm Handle Material: Aluminum Handle Finish: Anodized Blade Finish: Black MIL-C-13924 Burnished Blade Thickness: 3 mm Blade Grind: Flat Handle Color: Black Opening Method: Flipper Assisted Package Type: Box Color: Black Package Contents: Extrema Ratio Ferrum Rescue Linerlock Black