27 Piece 1/2" Drive 12 Point SAE/MM Mechanics Hand Tool Set 72-tooth teardrop shaped head with on/off switch allows more access in tight space. Quick release design makes it easy for rapid socket removal. Bright, full polish chrome finish easily wipes clean and resists corrosion. 12 point sockets feature off-corner loading design to reduce fastener rounding. Full polish chrome sockets with large hard stamp size markings. Magnetic bit holding screwdriver with ergonomic tri-lobe dual material handle provides the optimal balance of strength and efficiency. 5 extension for improved access. Premium S2 quality steel bits for lasting durability. Includes socket rail and bits holder for storage and organization. Meets or exceeds ASME specifications GWXSCBMTS12