Kershaw Knives Blur - Assisted Opening - Glass Breaker - Serrated - Black Handle and Blade - 1670GBBLKSTA tough, carbide glass breaker and partially serrated edge make this a must have emergency tool. The carbide glass breaker is key; a plain steel tip wont have the same effect in an emergency. To break out a windshield and pull a victim to freedom, its got to be carbide. The Blurs big, multitasking blade makes it an even more effective rescue tool. Built of high performance Sandvik 14C28N, the partially serrated blade cuts through seatbelt webbing with