Flesser&reg; Emergency Hammer 2 in 1 Car Auto Glass Breaker Seat Belt Cutting Tool Life-saving Safe Escape Kit Seatbelt Cutter Window Breaker Escape Tool (2 Packs) A Window Breaking Hammer Seat Belt Cutter with Recessed Razor Blade Family Two Pack, put one in each car you own Protect Your Whole Family multi-function, useful and helpful