Uses:
Seat belt cutter
Emergency Whistle
Glass Breaker
Technical Specifications:
Plastic body
Stainless steel blade 
Spring loaded spike
Colour: Blue with keyring
NOTE:
Be careful while using the tool. Wear safety gloves ideally
Always use common sense
Be careful of flying glass when breaking the window 
Use at edge as shown in the picture above
Periodically check spring for tension