Special Window Breaker for Dark & Underwater: Upgraded fluorescent circle let you locate the car escape tool faster, winning more time for self-rescue; precision knurling design increases friction and better grip when using; it will not slip underwater1 Sec Fast Window Breaking: The gun-shaped spring power function and 65 HR tungsten steel hammer head generate a pressure of 200 MPa. Pressing the window breaker can break the tempered glass in 1 sec, even 10 meters underwaterBreaking window is like picking up 16.9 fl oz of water: Unlike traditional car hammer, window breaker only requires the strength of lifting a 16.9 fl oz bottle of water. Note: when breaking a window, please select the four corners of the side glassNot deform even when the car rolls over. Can be used for various accidents, like rollover, flood, car fire, car sinking; Recommended to purchase 4 pack and place them in each car door storage box; Share this portable escape tool with family and friendsCut Seatbelt in Time: The double-sided sharp blade allows ladies to easily cut the stuck seatbelt; the hidden blade design prevents accidental cuts; please keep the seatbelt cutter properly when not in use and keep it away from children