Preventing the over-tightening of wheel nuts on passenger cars and light trucks, this ½" (12.7 mm) drive torque limiting extension maintains a consistent torque of 100' (30.5 m) lbs This gray-coded tool measures 1.07" (2.7 cm) x 0.48" (1.2 cm) x 7.63" (19.4 cm) and is designed for use with thin wall impact sockets.