Supply of 70 Pneumatic Engraving Pen Overall Length: 145-150 Mm Impact Rate: 32000-325000 Bpm Operating Air Right Angle Pencil Die Grinder 18? Inch Collet3mm Collet With Air Hose Of Length 300Mm Min F Angle Grinder Power: 700W Min ? 1000W Max Free Speed: 12000Rpm Min. -14000Rpm Max Maximum Pneumatic Weld Flux Chipper Bore X Stroke: 25.4 X 28.6Mm Blows Per Minute: 4000-4500 Approx. We Pneumatic Die Grinder Specification: Collet Size: 6Mm Or 14 Motor: 0.6 Hp Min Free Speed: