The BOSTITCH BTMT72265 398pc Socket Set consists of heavy duty ratchet featuring a 72-Tooth Gear System with low arc swing, high torque ratcheting & better accessibility. This set features spline design sockets accept multiple fastener types. 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 PS trays for easy storage in shop cabinets.