Features GREAT PARTS The safety switch on the air angle grinder prevents accidental engagement, an intake filter keeps the grinder clean and the built-in regulator makes speed control easier. 0.3HP MOTOR: Adopt 0.3HP motor, free speed can reach 20000RPM, tungsten steel moving parts, can withstand high temperature up to 20000℃, efficiency is increased by more than 75%. MULTIPLE USES: Can be used for processing, polishing, chamfering, deburring, grinding, engraving, etc. of metal, wood products, tires, etc., with a wide range of applications. EASY OPERATION: This pneumatic angle grinder needs to be connected to an air compressor to be used, with adjustable speed and replaceable grinding heads, easy to operate. PORTABLE DESIGN: The pneumatic die grinder is ergonomically designed for easy grip, and the 90 degree handpiece brings greater precision and possibility to those narrow and hard to reach places. Specification: Item Type: Pneumatic Grinder Set Material: zinc alloy, tungsten steel Collar size: 1/4 inch, 1/8 inch. Package list: 1 x Air Grinder 10 x Grinding Heads 2 x wrench. 1 x user manual (English language not 1port of admission 1 x collar. Small note: Be sure to add 2-3 drops of lubricating oil to the air inlet of the gun body and let it idle for half a minute before using it every day. Package List 1 x Air Die Grinder 10 x Grinding Heads 2 x Wrench 1 x User Manual 1 x Intake Port 1 x Collet