PCL APT205 Drive Air Impact Wrench Gun Ratchet 540Nm Genuine PCL. Ideal for general purpose repairs in busy workshops, the PRO 1/2 Impact Wrench has been designed and manufactured to PCL's high standards, featuring a pin clutch hammer mechanism with forward and reverse mode. Good weight distribution for maximum comfort. 3.6 cfm / 102 l/min. 3/8 in / 10 mm.