Features Higher Speeds: The square pneumatic sander enables a high speed up to 10000rpm, which enables high working efficiency. Smart for Use: Push switch and comfortable hand feel will largely simplify the operation, suits for irregular grinding. Reliable Work: High accuracy chuck and strong head allow for more stability and low air consumption under high power. Broad Utility: Can be applied to processing the fine finishes of wood, metal, fibreglass and other composite materials. Built in Filter: The air inlet interface contains a filter to prevent debris from entering, so as not to damage the body. Feature: 1. Higher Speeds: The square pneumatic sander enables a high speed up to 10000rpm, which enables high working efficiency. 2. Smart for Use: Push switch and comfortable hand feel will largely simplify the operation, suits for irregular grinding. 3. Reliable Work: High accuracy chuck and strong head allow for more stability and low air consumption under high power. 4. Broad Utility: Can be applied to processing the fine finishes of wood, metal, fibreglass and other composite materials. 5. Built in Filter: The air inlet interface contains a filter to prevent debris from entering, so as not to damage the body. How to Use: Every day, inject 3‑5cc of pneumatic oil from the intake joint, press the switch, and idle for a few seconds.  Specification: Item Type: Air Sander Material: Zinc Alloy Inlet Size: 1/4in Deflection: Approx. 0.5mm / 0.02in Speed: 10000rpm Package List: 1 x Air Sander 1 x User Manual Package List 1 x Air Sander 1 x User Manual