This pneumatic chamfering machine offers a wide range of applications for chamfering R and C angles, round holes, irregular edges, arcs, and straight edges on various materials including steel, aluminum, copper, acrylic, and wood. The mini deburring trimming tool features an air grinder with a 1-5 block valve adjustment and a thickened knob for free gear speed control. Chamfering size is adjustable to meet different requirements. A safety switch is included to prevent accidental activation and ensure safe operation. This 45-degree pneumatic mini chamfering tool is lightweight, compact, and designed for easy one-handed operation. The chamfering depth and blade can be quickly adjusted using the included spanner. C angles are angled and primarily used for metal chamfering, while R angles are rounded and typically used in woodworking applications. Free speed: 30,000 RPM. Air consumption: 0.4 m³/min. Air inlet port: 1/4 inch PT. Trimming capacity: Chamfering C0.1–C1.5, arc corner R0.1–R1.5, adjustable depth 0.1 mm–0.9 mm. The machine features a new lightweight design for comfortable handling and efficient performance on metal and wood surfaces. Safety switch helps prevent accidental contact for enhanced user protection. Lightweight construction allows for easy one-handed operation and quick deburring. Product name: Chamfer Tool. Connector: 4 cm. Chamfering hole diameter: ≥8 mm. Color: As shown. Material: Metal. Dimensions: 15 x 5.8 cm. Disc diameter: 4.8 cm. Body diameter: 3.2 cm. Package contents: 1 x Black Pneumatic Chamfering Machine, 2 x Bearing Fixing Screws, 4 x Blade Fixing Screws, 6 x C Angle Blades, 6 x R1.5 Blades, 6 x Bearings, 1 x Connector, 2 x Spanners, 2 x Sealing Rings.