Feature:1. 10 STYLES OF GRINDING HEADS: There are 10 different styles of grinding heads, matched with different sizes of drills, suitable for grinding, polishing, hole repair, light welding, seaming2. MORE ACCURATE OPERATION: The radial runout is less than 0.15mm, which makes the operation more accurate and the work efficiency higher3. WELDING, CUTTING AND POLISHING: A simple touch stick can be accurately applied to various speed applications, such as welding, cutting and polishing surfaces4. IMPROVE BALANCE AND REDUCE VIBRATION: High quality bearing structure improves balance and reduces vibration, making the engraving machine more durable and service life longer5. 25000RPM NO LOAD SPEED: No load speed is 25000rpm, air consumption for 4 CFM, and come with 90PSI air pressureHow to Use:Replace Grinding Head:Use two special wrenches to clamp the corresponding position of the mold grinding head, fix the small wrench, turn the big wrench to transfer, load(unload) the grinding head, and tighten to complete.Specification:Item Type: Air Die Grinder KitMaterial: Carbon steel + stainless steelChuck Specifications: 1/4in(6mm), 1/8in(3mm)No Load Speed: 25000rpmAir Consumption: 4CFMAir Pressure: 90PSIAir Inlet: 1/4inInterface Type: Japanese interfaceUses: Used for grinding, polishing, hole repair, light welding, seam, grinding Package List:1 x Air Die Grinder10 x Grinding Head2 x Chuck2 x Wrench1 x Pneumatic Interface1 x User Manual1 x Storage Box