The JET 404424 (AD12HDR) is a heavy-duty pneumatic drill with a 1/2″ keyless chuck and reversible operation. Its double-reduction planetary gear delivers up to 800 RPM and robust torque, while the ½″ chuck handles standard bits for metal or wood drilling. A side handle offers user control and absorbs stall torque reaction. At 9-1/2″ long and drawing ~4 cfm at 90 psi, it balances power and manoeuvrability for industrial drilling work.