air die grinder has a ball-bearing construction, provides a robust 20,000 RPM operation at 90 PSI and 4 CFM air consumption, pair it with a air compressor for precise, high-powered grinding tasks every time Our air die grinder is fortified with metal housing, ball bearing construction, and precision-machined steel gears. The core components undergo special industrial treatment, which is lighter, longer wear and longer product life Our air grinder have lock ensures zero accidental startups. Note: when using this tool, we suggest you need to wear occupational protection tools, such as work goggles, work gloves, and hearing protection The air angle die grinder has the characteristics of light weight, low vibration design, easy operation, and is ideal for glass grinding, jewelry polishing, ceramic milling, stone cutting Colour:As Shown Material:Metal type:A Package Contents: 1 set x angle grinder tool Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.