Extra short length which allows it to be used where a traditional impact wrench could not. 1/2""D x 135mm long head. 1/2""D impact sockets x 75mm long: 17mm, 19mm, 21mm. 1/2""D sockets x 28mm long: 14mm, 15mm, 16mm, 17mm, 19mm, 21mm, 22mm, 24mm. 1/2""D Adaptor, air line connector and oil pot. Torque 500lb-ft, RPM 11000.