Feature: 1. Extended Die Grinder: The extended die grinder is easy to use, with high concentric speed, smoothly operation, no yaw grinding. 2. 2 Collets: Equipped with 3mm and 6mm collets, which have high precise, not easy to wear, you can choose to use according to different situation. 3. Speed Adjustment: You can freely control the speed by adjusting the intake air volume, cope with different working conditions. 4. Multi Function: This grinder can be used for metal grinding, polishing, rust removal, tire repair, wood and craft processing, welding spot removal, grinding, etc. 5. Multi Purpose: The extended die grinder is suitable for mold factory, tire factory, shoe factory, metal processing industry, etc. Specification: Item Type: Air Die Grinder Material: Aluminum Alloy Collet Size: Approx.3mm/0.1in, 6mm/0.2in Rated Pressure: 90PSI No Load Speed: 20000rpm Usage: For grinding, polishing, machining, repairing, rust removal. Package List: 1 x Air Die Grinder (With One Collet)2 x Wrench1 x Collet1 x Connector Note: Drop 2‑3 drops of pneumatic lubricating oil into the air inlet before and after each use, then idle for a few seconds to complete the maintenance.