Chicago Pneumatic 879 3/8" Angle-Head Air Drill Reversible 1,800 RPM. Compact, low profile head for drilling in confined areas. Convenient reverse valve for simple directional changes. Rear exhaust directs air away from the workpiece. Teasing throttle for control from start-up thru run down. Applications: screwdriving, drilling in hard to reach areas. Specifications: Chuck Size - 3/8", Length - 8-1/4", Average Air Consumption CFM - 4, Air Inlet NPTF - 1/4", Free Speed rpm: 1800.