The BOSTITCH BTMT72261 105pc Mechanics Tool Set consists of heavy duty ratchets featuring a 72-Tooth Gear System with low arc swing, high torque ratcheting & better accessibility. The specially contoured and ergonomically designed ratchet handle also has anti-slip knurling for a comfortable grip. The sockets have durable stamped size markings for easy socket size identification, with anti-slip rings on the sockets for easy gripping, Made from chrome vanadium steel construction for strength & durability. Includes a durable blow mold case with metal latches for tool protection.