Walther BUK Back Up Knife Fixed Blade Knife 4in 440 Stainless Steel Standard Edge Black Synthetic Handle. 375"; Blade: 4" l 440 Stainless l Standard Edge l Black Finish; Handle: Black l Synthetic; Other Info: Thumb Ridge l Lanyard Hole. Black Kydex sheath with belt clip attachment and cord lanyard. Boxed. Specifications for Walther BUK Back Up Knife Fixed Blade Knife: Manufacturer: Walther Blade Length: 4 in Overall Length: 8.38 in Blade Material: 440 Knife Application: Fixed Blade Handle Material: Synthetic Blade Finish: Black Handle Color: Black Blade Grind: Standard Handle Finish: Black Sheath Material: KYDEX Package Contents: Walther BUK Back Up Knife Fixed Blade Knife Walther Arms 5.0720-US: BUK Back Up Knife Fixed Blade Knife 4in 440 Stainless Steel Standard Edge Black Synthetic Handle