This mini pneumatic polishing machine is light and compact, easy to carry and easy to operate. It is suitable for polishing molds with irregular shapes or narrow gaps, and is very suitable for home or industrial use. Features: Strong power, efficient polishing, eccentric high-frequency vibration, and less prone to stopping due to external resistance, with high efficiency and good performance. Grinding back and forth from left to right with a deviation of 3mm, efficient grinding, more uniform and faster. The replaceable pad is easy to replace to meet different working needs. Equipped with stepless speed control button, the speed and force can be adjusted according to different work needs. Portable and compact, easy to carry. With non-slip handle, easy to operate. This straight line air sander is suitable for grinding narrow gaps, irregular workpieces, metal molds, wood decorations, metal jewelry, etc. Specifications: Model: YC2621 / YC2622 (Optional) Working Pressure: 0.5-0.7Mpa Vibration Gauge: 3mm Air Inlet: 1/4 Inch No Load Speed: 14000rpm Material: Metal Item Size: YC2621: 20 * 9.3 * 4.3 cm / 7.87 * 3.66 * 1.69 inch YC2622: 20.5 * 9.3 * 4.3 cm / 8.07 * 3.66 * 1.69 inch Item Weight: YC2621: 806g / 28.43oz YC2622: 810g / 28.57oz Package Size: 22 * 12 * 5 cm / 8.66 * 4.72 * 1.97 inch Package Weight: YC2621: 950g / 33.51oz YC2622: 930g / 32.8oz Package List: 1 * Grinding Machine Set 1 * User Manual (English)