Seat Belt Cutter and Window Breaker by LIFETOOLS | Car Hammer for Auto Safety & Escape QUICKLY CUT SEAT BELTS. Cut through tangled or stuck seat belts using the high-carbon blade. EASILY BREAK CAR WINDOWS. Break your car window in an emergency using the sharp, steel tip. HOLDER INCLUDED. Mount your hammer using the custom-fit holder so you can reach it in an emergency. FLAT HEAD. Use the flat hammer head to clear broken glass. CONVENIENT. A tethered tip protector and recessed blade make this tool safe and easy to use.