Defcon Hydra Fixed Blade D2 Satin Coated Fixed Blade Knife 5.5in D2 Tool Steel Black G10 Handle. The Defcon Hydra D2 includes a molded sheath with drain holes to prevent water from entering the sheath. This protects the blade and prevents it from being accidentally opened in the first seconds. Defcon D2 Series are made of D2 an exclusive dual-phase chromium and nitrogen alloyed steel that resists rusting and retains its sharpness for a very long time. The advantages of this high-performance material include the increased sensitivity to the cutting edge the non-slip grip and the outstanding sharpness and corrosion resistance. Moreover the special coating allows the user to better distinguish the different layers of the same material. Specifications for Defcon Hydra Fixed Blade D2 Fixed Blade Knife: Manufacturer: Defcon Blade Material: D2 Knife Application: Fixed Blade Handle Material: G10 Handle Color: Black Handle Finish: Black Sheath Material: KYDEX Package Contents: Defcon Hydra Fixed Blade D2 Fixed Blade Knife Defcon TD002SL: Hydra Fixed Blade D2 Satin Coated Fixed Blade Knife 5.5in D2 Tool Steel Black G10 Handle