This is the EEZYCUT Trilobite Knife with Harness Pouch and 2 Spare Blades Features: Developed for Divers, Mariners, Mountaineers, Extreme Sports Adventurers and Rescue Service Providers Delivers Swift, Safe, Efficient Cutting Specifically for Self Rescue or for the Assistance of Others Unique Line and Webbing Cutting Device Cuts Line from 0.31 (8 mm) to 0.47" (12 mm) Harness Pouch Included Two 440A Stainless Steel Replacement Blades The forefront of Emergency Cutting Tool (E.C.T.) dynamics and design, the EEZYCUT TRILOBITE was developed for divers, mariners, mountaineers, extreme sports adventurers and rescue service providers who demand a tool that delivers a swift, safe, efficient cut. "