ZDGL-321 Low Noise Air Angle Die Grinder The ZDGL-321 & LA-2115 Angle Die Grinders are ideal for high?ÕÌ_speed grinding and polishing. It can be used in finishing dies and metal molds, smoothing and?ÕÌ_shaping sheet metal and cast iron, weld finishing and other high?ÕÌ_speed polishing applications. Can use with 1/4Ì_Ì__(6mm) or 1/8Ì_Ì__(3rrm) grinding accessories. SPECIFICATION Specification Collet?ÕÌ_size: 1/4(6)?ÕÌ_inch(mm) Net Weight : 1.5(0.7) lbs(kgs) Length: 7(180) in.(mm) Free Speed : 18000 RPM Air Inlet Size : 1/4 inch-NPT/PT Min. Hose Size : 3/8(10) inch(mm) Avg. Air Cons. : 3.1?ÕÌ_cfm