Channellock 171-Piece Mechanic"s Tool Set, 39053: * 171-piece mechanic"s tool set * .5", 3/8" and .25" drives * 72 gear teeth quick-release ratchets, flat panel and full polish SAE and metric combination wrenches * Chrome vanadium standard and deep sockets * SAE and metric hex keys * Magnetic bit driver with full range of fastener bits * Durable storage case * Material warranty