The 13-pc 1/4" and 3/8" Drive Torx Bit Socket Set, No. 48-22-9532, from Milwaukee Tool, includes a storage rail and laser-engraved size markings for easy organization and identification. Each socket features four parallel flat sides that resist rolling and is wrench-compatible. The one-piece socket design provides better durability and eliminates the risk of the bit separating from the socket base. Each socket is chrome plated for rust and corrosion protection, and all bit sockets are backed by a lifetime guarantee.