Giveumore Car Broken Window with Paragraph Artifact Keychain Seat Belt Cutter Emergency Rescue Chain Automotive Safety Hammer Escape Tool Keychain Keyring To align the glass , straining with a beat down , you will hear the "pop " sound , then the broken glass , but inside the needle is stopped as soon bounced back strongly , so you can not see exposed needle , the needle is hidden inside , this design principle is to use a more secure , let's not easy to easily hurt . scissors on the cover in protective sleeve pulled out, take this cut seat belts. Just get another one ( not black the other end ) on the mouth blow rang. This product is for emergency situations on the car in case of extraordinary self-help tool for emergency situations , trapped in the car drivers can use the tool cut the seat belt and failure can not open the window when it shattered escape This product Do not give the child to play , enclosing the firing pin . Please avoid stabbing the human body.