This is a safety hammer that breaks windowsIt allows drivers to be prepared for emergency situations, shattering the entire car's windows, cutting off jammed seat belts, and even breaking the windows under water pressure, making emergency evacuation accessible.Safe without hurting handsSafety hammer U-shaped opening prevents reaching in of fingers and accidental scratches.The size and weight are the same as car keys, thus it is simpler and more fashionable.Compact and portable design: The design of car safety tools is compact and simple, Compact and easy to carry, ensuring you always have a lifesaving tool within reach.Hard materials: The working principle instantly generates a strong impact force. Even for everyone, it is easy to break a window.Can be used underwater and on land: Ordinary safety hammers cannot be used underwater. Our safety hammer adopts an impact design, generating a huge explosive force that instantly breaks the car window. Let you escape within a few seconds.