BLACKHAWK! Injection-Molded Nylon Sheath for CQD Mark I Knife BLACKHAWK! product Versatile sheath Manufactured by ATK Provides secure housing for both the BLACKHAWK! Mark I Type E Manual Folder and Mark I Aluminum Handle Manual Folder Allows the knife to be carried in the open position like a fixed-blade knife Allows for immediate combat draw Dual adjustable tension screws This item is not for sale in some specific zip codes