Steelman 50074 1/2-Inch Drive x 21mm 100 ft-lb Torque Stick, Sky Blue 8-5/8-INCHES LONG - Torque stick is 8-5/8-inches long to allow easy clearance and prevent damage to wheels by a too close impact wrench RESILIENT STEEL - Made of durable and resilient chrome molybdenum steel INTEGRATED SOCKET - Fitting any 1/2-inch drive impact wrench this stick has an integrated 21mm lug nut socket PREVENT OVER-TIGHTENING - Prevent over-tightening that can lead to premature failure of wheels, wheel studs, and rotors FLEXES TO LIMIT TORQUE - When 100 ft-lb of torque is reached the extension will flex and absorb additional impacts instead of continuing to tighten POWDER COATED - Powder coated sky blue for additional corrosion resistance and to easily identify it among other extensions and tools CALIBRATION FREE - With a pre-determined maximum allowed torque and no moving parts it is maintenance and recalibration free