5in1 Digital Tire Guage Features : > Digital Tire/Pressure Guage > Bright LED / Flashlight > Digital Tread / Depth Indicator > Emergency / Seat Belt Sheer > Glass Shattering / Escape Hammer Attention: Exercise caution when using and storing the 5 in 1 safety tool, Many of the components can cause harm or injury used in a maner which they were not designed , Follow instructions carefully. Keep safety tool out of reach of children. We recommend that you cover your hand before using the hammer. This will help to prevent being cut by the glass , Use the escape hammer with caution , Not compatible with laminated windows and windshieids.