Package Including :◆ 2/4pcs Black Bracelet Car Window Breaker◆ 1* PE film storage boxProduct Material: Tungsten Steel,RubberSpecial Materials:Our car emergency self-rescue tool is made of 3mm high-quality elastic cords and special tungsten carbide bead, The design of tungsten carbide bead allows users to generate high speed for the beads with minimal movement.Small and exquisite：Wristband window breaker is not only an escape tool, but also a good accessory, cool equipment, can be matched with other fashion bracelets. Simple and plain appearance.Our bracelet glass breaker is suitable for various vehicles such as cars, buses, trucks, etc. It can be given as a gift to your parents, husband, wife, siblings, friends and teachers, and even more.This gadget can help you in unexpected situations.Instructions:➤1. Remove from the wrist➤2. Wrap the tool around your thumb and index finger➤3. Place the bead close to the glass and pull it up like a slingshot➤4. Release the bead, hit the glass, the glass shattered➤5. QUICKLY ESCAPE!NOTICE:1. Select the left or right window, the window breaker doesn't work on car windshields. It is effective only against tempered glass commonly used in side windows.2.Storage Box made of strong ABS plastic and transparent flexible PE membranes, lightweight, double sided 3D floating effect PE membrane will produce a crease after use. However, it can be removed by simply blowing it with a hairdryer, easy and durable for use.