"FW-6PX series 3/8"" impact wrenches consists of 2 type of products with single or double hammer clutch mechanism. Both products are designed with metal housing and motor for high durability. Working torque range for FW-6PX-5 series is recommended from 10 to 17 Nm, and for FW-6PX-6 sereis is from 8 to 21Nm. The FW-6PX series consists of 2 type of anvils - flat button retainer and pin-hole retainer. The range also provide PT and NPT inlet for all markets."