You have a XS Scuba Knife and you misplaced or have broken your Knife Sheath. This Replacement Sheath is compatible with the XS Scuba's Fog-Cutter X and Stryker Knives and can get you back in the water with your knife strapped back in place. Sheath is made from a Durable Non-Corrosive Plastic and has the same Double Lock as the old one. Sheath also includes 2 Rubber 22" (55.9 cm) Leg Straps with Quick-Release Buckles. Sheath and Straps are covered by a 24 month limited warranty.