Feature 1, High quality alloy and steel material, reliable and durable in use. 2, Compact size, light weight, convenient to operate in small space. 3, Easy to remove, quick change chuck for easy buffing wheel change. 4, Good mechanical performance, a perfect tool for polishing and grinding. 5, Suitable for grinding, trimming and engraving the surface of metal parts, wood components, rubber tires and castings, etc. Features: High quality alloy and steel material, reliable and durable in use. Compact size, light weight, convenient to operate in small space. Easy to remove, quick change chuck for easy buffing wheel change. Good mechanical performance, a perfect tool for polishing and grinding. Suitable for grinding, trimming and engraving the surface of metal parts, wood components, rubber tires and castings, etc. Specification: Condition: 100% Brand New Material: Alloy, Steel Color: As Picture Shown Chuck Size: 3mm/6mm Free Speed: 25000rpm Working Pressure: 6-8kg Air Consumption: 170L/MIN 4cfm Air Inlet Size: 1/4inch Tube Inter Diameter: 3/8inch Size: As Picture Shown Length: Short, Medium, Long(Optional) Package Weight: Approx. 630-790g/22.2-27.8oz Package list: 1 * Pneumatic Grinder 1 * Chuck 1 * Inlet Interface 2 * Wrench Note: 1. Always use a water separator and drain regularly to ensure that the movement is dry. 2. The daily probation period must be drop 2-3 drops of lubricating oil in the air inlet of the gun body and idling for half a minute.