Hign-concerned Chemical:NoneOrigin:Mainland ChinaProduct Information Features: 1. Made by CR-V with chrome-plated surface make it more anti-rust and wear-resistant 2.72 teeth drive makes it more labor saving and convenient to use 3. With quick stripping function, the sleeve suspension is more reliable, and the wear of the sleeve head is avoided. 4. The rubber handles is humanized design, having non-slip, shock absorption, reduce labor intensity. 5. Suitable for factories, production lines, repair shops, auto repair shops, 4S workshops, personal car modification, etc. Specification: Material: CR-V steel Color: black Square head size: 1/4" (6.3mm), 3/8" (10mm), 1/2" (12.5mm) Length: 1/4"(150mm), 3/8"(200mm), 1/2"(250mm) Packing list:1*ratchet wrench