Craftsman 30pc Max Axess 1/4 & 3/8-in. Drive Socket Wrench Set with Rugged Case High tensile strength steel construction is torque ready Unique exterior socket interface bears more weight than traditional ratchets Ergonomic design and thumb direction adjustment make working easy and 3/8in sizes cover most light and medium duty jobs Extensions improve access;Pass through design eliminates the need for deep well sockets