1. Multi-function hammer, can be used Car Safety Hammer, Nail Puller, Screwdriver Bit Set, Bottle Opener2. Ratchet bit driver 2 position function: Straight ratchet bit driver foetightening and loosening screw easily.3. Ratchet wrench provild more power for tighten snd loosen nut easily.4. Widely used in Occus , household, fitter, electrician, etc.