OTC (6187 TORX PLUS Socket - TP40, 3/8" Square Drive TP40 with a 3/8 inch square drive Made with two piece construction S2 grade steel, one of the highest quality tool grade steels used in production, this bit socket is designed for endurance A natural finish ensures that this socket wont crack or peel like many chrome plated versions can This high quality bit socket will provide a lifetime of performance when used with hand tools The warranty is voided if this bit socket is ever used with impact tools