- Speed and adjustable control: The portable air grinder is designed for deburring, trimming, chamfering and 1-5 block valves. You can freely adjust the gear speed and the chamfer size to match the task. A safety switch helps prevent accidental activation for safer operation. It features a 1/4 metal filter, idle speed of 30000 rpm, and air consumption of 0.4 per minute. - Easy to use: This 45 degree mini chamfering machine has a lightweight, compact design for convenient handling. Included wrench lets you easily adjust the chamfer size and replace the blade. It can be operated with one hand. - Speed and durability: The pneumatic metal chamfering tool withstands strong impacts and high speeds. Increasing the speed yields a smoother chamfer and enhances overall durability of the tool. - Practical use scenarios: - Deburr and bevel edges on metal plates after cutting in fabrication or repair work. - Chamfer tube ends or pipe fittings before welding for a clean joint. - Finish edges on brackets, housings, or small metal components in assembly or maintenance tasks.