The Zak Tools Key Ring Window Punch is an essential tool for emergency rescue or escape. Its heat-treated stainless steel body and precision-shaped head shatter glass with ease for rapid entry into a vehicle or building. Simply place the head against the glass, pull back the spring-loaded end, and release to deliver an extremely forceful impact. The punch comes with a key ring attachment so that you can carry it with you everywhere you go, ensuring that you are always prepared for the worst. The knurled shaft provides a secure grip for ease of use.