Features 1、WITH COLLETS: The pneumatic die grinding pen is equipped with 2 collets(2.38mm and 3mm), which can be widely used in molding, automobiles, metal, wood, etc. 2、VARIOUS FUNCTIONS: The mini air die grinder kit is suitable for grinding, grinding, polishing, deburring, drilling, engraving and other work needs 3、HIGH EFFICIENCY: Pneumatic pencil die grinder no load speed is 70000rpm, stepless speed regulation; Possess large torsion, high working efficiency 4、ACCURATE STRUCTURE: Pneumatic pencil die grinder adopts three bearing structure, thick hard cylinder and alloy rotor; accurate assembly, low vibration, superior performance 5、HANDLE AND AIR INTAKE: Mini pneumatic air pencil die grinder kit with non slip handle for comfortable grip. 1/4 inch air intake with air hose for flexible use 6、COMPACT AND PORTABLE: The 70000RPM mini air die grinder kit is compact and lightweight, making it easy to operate with one hand. Plastic box packing, easy to carry Specification Item Type: Mini Air Die Grinder Kit Model: KP-6110 Collet Size: Approx. 2.3mm / 0.09in, 3mm / 0.12in Operating Air Pressure: 0.4-0.6Mpa Speed: 70,000rpm Package List 1 x Grinder 1 x Air Inlet Connector 1 x Replaceable Chuck 2 x Wrench 1 x Carrying Case 2 x Grinding Head 1 x Accessory 1 x Hose