SK11 SIW-320AC by Fujiwara Sangyo Corded Impact Wrench Socket Drive: 1/2" (12.7mm) Max. Tightening Torque: 320N Used for tire changes, etc. There are signs of use and dirt, but there are no operational problems. The cord is 10m long, so it can be used even if you are far from an outlet. Sockets for 17, 19, and 21 are included. A plastic case of a suitable size for storage is also included.