BT 6321-12 | 12" Extra Long Extension 1/4“ Straight Air Die Grinder, Professional Grade Heavy Duty Variable High Speed (Straight, 12" Extension) This Straight Die Grinder is Constructed with High Quality Components Designed for Long Term Use. Equip with 12" Long Extended Shaft Give Extra Length to Reach Tight and Confined Areas. Powerful 0.5HP Motor and Low Air Consumption. Designed for High Speed Grinding with Adjustable Free Speed of 20000 RPM. Ideal for Porting, Weld Grinding , Smoothing Edges, De-burring, and Polishing Applications.