Features: Good quality and practical, a perfect set of tools for polishing and grinding. Small size, light weight, high speed, low noise level. Ergonomics design, compact and superior performance grinding and polishing tool, which not easily make people feel fatigue. This tool has the advantages of convenient use, small air consumption, simple operation and low cost. High concentricity, high efficiency revolution, high quality, long service life. Applicable to all types of molds, hardware products, glass, stone, handicrafts, jewelry, circuit board manufacturing and other needs of cutting, grinding, finishing operations. Specification: Material: Aluminum Weight: 1038g/36.6oz Model: AT-7033K Working Pressure :90psi (6.2Bar) Chuck Size: 6mm & 3mm No Load Speed: 18000-23000rpm( The lowest value marked on the product) Gas Consumption: 4 CFM Inlet Port :1/4BSP Polishing Machine Length: 17cm/6.7inch Package List: 1 x Pneumatic Sander 5 x Grinding Head (6mm rod diameter) 5 x Grinding Head (3mm rod diameter) 2 x Wrench 1 x Inlet Connector 1 x Chuck (3mm inner circle diameter) 1 x Package Box Note: 1. Please allow 1-2cm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. .