1、Standard Collet: The collet of the air die grinder is durable with high concentric rotation, stable operation, and no yaw. And there are 2 sizes 3mm, 6mm to meet your different working needs. Very practical tool. 2、Air Volume Adjust Speed: Our air die grinder controls the speed through the air intake volume to cope with different working conditions. 3、Aluminum Alloy: Made of premium aluminum alloy, this air die grinder is wear resistance and corrosion resistance, suitable for long term use. 4、Portable: Comes with small size and lightweight, you can easily take it with you to help with your work. 5、Wide Application: This air die grinder is widely used for grinding and polishing, grinding tires, removing solder joints, and smoothing. It is suitable for deburring of finished products in mold factories, tire factories, shoe factories, and metal processing industries.