ASTRO Anti-lost Key Chain / Signal Mirror with Compass / Plus Access Multi-function Outdoor Survival Tool (Anti-lost) Carbide glass-breaker between two protective o-rings. Great for holding ID cards, keys, and many more. Design Portable Easy to carry for daily use Mini tool High quality. How size inside wrench Screwdriver Bottle opener Screwdriver. Great for: Repairmen, mechanics, carpenters, hobbyists, campers.