1/4" Drive x 10mm Magnetic DeepFeatures and Benefits - Powerful magnet holds any fastener securely - Feature a spring loaded magnet that retracts into the socket for extended bolt applications - Great for use in impact or non-impact applications - Made of high quality steel (chrome-molybdenum); thorough and exact heat treatment insures the correct balance of strength and durability - Lifetime warrantyThis magnetic impact socket features our high torque drive. This feature limits the amount of wear on the corners of the fastener and the socket. It also improves the strength of the socket, transfers increased torque to the fastener and allows easier access to tight areas. Each socket is thoroughly made with the correct balance of strength and durability and is tested to the highest specifications to deliver outstanding performance at the most competitive cost.