1)1/2" Air Impact Wrench (twin Hammer Type) 2)Common applications are tire changes, heavy automotive and truck work. DESCRIPTION: ... set*1/2" air impact wrench*1pc extention bar*1pc mini oiler*1pc air nipple*10pcs sockets set;socket size:9 ... ,11,13,15,17,19,22,24,27mm Twin Hammer Type Air Impact Wrench