Our 12pc 3/8" Drive 12-Point SAE Deep Well Socket Set with FOUR FLAT™ sides is designed from the ground up to be part of the most versatile socket family. Milwaukee® sockets feature an innovative design with four parallel flat sides, which deter rolling and are wrench compatible. The laser-engraved size markings provide easy identification, and chrome plating offers rust and corrosion protection. This set includes a storage rail for better organization. All Milwaukee® sockets are backed by a Lifetime Guarantee.