Universal Tool Reversible Internal Spline Drive Tools feature a 0.8 HP Motor for ultimate stall resistance, fully caged gears with needle bearings for ultimate reliability, a ported throttle valve for ultimate control and reliability and a through handle exhaust with a built-in silencing system.Universal Tool Reversible Internal Spline Drive Tools feature an advanced ergonomically designed handle with ‘Softouch’ coating offers ultimate comfort and reduced vibration, an internal spline drive for use with Universal Tool or Jiffy ‘L’ – foot and pancake drilling attachments, reversible for back drilling requirements and is best for continuous precision air frame work.