Features 1、APPLICABLE FIXTURES: You can use different fixtures for grinding operations, you can clamp files or grinding tools, such as manual machining of grooves in molds or hardware products, R angles, etc. 2、DURABLE MATERIAL: The pencil die grinder body is made of aluminum alloy, sturdy and durable, can be used for a long time, and easily cope with various grinding needs 3、SURFACE REPAIR: Pneumatic engraving pen can be used for mold roughing and mirror polishing to quickly reduce the surface roughness of the working mold down to the lens, an irreplaceable effect by hand 4、FAST AND EFFICIENT: Air micro pencil grinder kit adopt accurate movement, long service life, can withstand 23,000 times per minute high reciprocating frequency, improve grinding speed, speed up work efficiency 5、WIDE RANGE OF APPLICATIONS: Turbine reciprocating pneumatic ultrasonic grinding machine, with the oil stone chuck can clamp fiber stone, but also can clamp micro ceramic fiber stone, file and other grinding tools. Mirror processing for various metal cutting, slit, grinding, polishing, etc. Especially for accurate machining of die parts, widely used in various abrasives Specification Item Type: Pencil Die Grinder Air Tool Speed: 23,000rpm Highest Working Pressure: 0.6Mpa Air Inlet: 1/4in Collet Size: 1/8in(3mm) Package List 1 x Reciprocating Pneumatic Ultrasonic Grinding Machine 1 x Sponge Cover 1 x Wrench 1 x Chuck 1 x Air Pipe 1 x User Manual