REPLACEMENT SHEATH - Replaces a lost or damaged sheath for the Estwing 5.5-inch Double-Edged Duct Knife DURABLE NYLON - Constructed of durable nylon to provide protection and puncture resistance IMPACT RESISTANT - Nylon construction resists the bumps and impacts of jobsite use RETENTION BUTTON - Molded in retention button keeps store knife secure during active movement BELT CLIP - Molded in belt clip allows easy attachment to everyday wear and wider tool belts