Extrema Ratio BF2 CD Linerlock 3.50 in Folding Knife. 7cm) closed. 3.5" (8.89cm) black MIL-C-13924 burnished Bohler N690 stainless blade. Black anodized aluminum handle. Thumb stud. Pocket clip. Boxed. Specifications for Extrema Ratio BF2 CD Linerlock 3.50 in Stainless Steel Folding Knife: Manufacturer: Extrema Ratio Blade Length: 3.5 in Closed Length: 127 mm Blade Material: Stainless Steel Condition: New Additional Features: Pocket Clip. Weight: 0.5 lb Quantity: 1 Color: Black Package Contents: Extrema Ratio BF2 CD Linerlock Black