5 Extensions: With a machine welded 1/2" drive plate, this kit includes (1) 65 ft-lb, (1) 80 ft-lb, (1) 100 ft-lb, (1) 120 ft-lb & (1) 140 ft-lb extensions. Design: The torque extensions are easy to use and are constructed with a spring steel design that stops turning once preset torque is reached, providing smoother operation and longer tool life. Ease of Use: These extensions are laser etched with their size and torque rating, for permanent identification and easy reading; They also include a carrying case for effective storage and organization. Application: Great for heavy duty automotive tool use; These extensions prevent damage to wheels and brake rotors from over-tightening or uneven tightening of lug nuts.