The Milwaukee 12-Piece 1/4", 3/8" and 1/2" Drive External TORX® Socket Set with FOUR FLAT™ sides is designed from the ground up to be part of the most versatile socket family. Milwaukee® E-Torx 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.