This Goodyear 1/2” Composite Impact Wrench is a powerful tool for any automotive enthusiast or professional mechanic. With a maximum torque of 650 Ft-Lb, this single item tool can handle any job. The air inlet size is 1/4in. and the drive size is 1/2in. making it compatible with a wide range of air tools. The manufacturer part number is AT-5040C. The composite material used in the construction of this impact wrench makes it lightweight and easy to handle. The brand Goodyear is known for its high-quality products and this impact wrench is no exception. It is perfect for use in any workshop or garage. Get your hands on this impressive tool today! Thank you for looking & please ask any questions!