28580 industrial reversible 12 keyed jacobs chuck air drill handle 650 rpm pneumatic drills master palmMaster Palm Industrial Reversible 1 2" Keyed Jacobs Chuck Air Drill with bottom grip and side handle, 650 Rpm Unique Clamp Shaft Design: newly designed side handle is used as strong support, just clip the side handle ring into the female type side handle grip, for either right or left handed to operate tool at ease comforts. One hand Reversible Lever. Planetary System Dual Direction Motion Trigger Press: Easy to switch between reverse or forward