1. Size: about 8.4x2.8x2.5 cm/piece
2. Weight: about 25g/piece
3. Material: ABS
4. Purpose: window breaker
5. Features: precise working principle, light and compact, freely placed without taking up space, sharp cutting knife, easy to cut the seat belt, mechanically broken windows, saving time and effort, without fear of water pressure, and can be used underwater