Accutorq torque sockets make it quick, simple, and accurate! Using the Accutorq torque sockets, you can increase your shop efficiency and eliminate damage caused by impact wrenches. The high quality AccuTorq torque sockets are a low cost and efficient way to accurately torque lug nuts. There is nothing to calibrate or maintain! Innovative AccuTorq technology guarantees accuracy every time! AccuTorq patented "strobe mark" lets you see exactly when your lug is at the correct torque. No more damaged wheels or studs! No more customer hassles! And they even offer a LIFETIME MANUFACTURER'S WARRANTY!