High Performance: Upgraded beveling grinder with high-quality bearings and blades for smoother deburring and chamfering. Triangular tungsten steel cutter heads, chamfer R-angle/C-angle, auxiliary bearing, strong and durable, smooth chamfering, no ripple, no noise, compact body, strong power, stable operation. Flexible Adjustable: The speed can reach 30000rpm, air intake connection: 1/4 Inch, and the depth is 0.1mm-0.9mm. The five gears can be freely adjusted to the appropriate air intake speed, which improves the life of the blade and is easy to operate and use. Easy Operation: This 45-degree mini chamfering machine air tools has a new lightweight design, small and exquisite, smooth cut, high efficiency, low vibration, smooth cutting. Easily operated with one hand. Difference Between C & R Angle: C Angle blade is angular, mostly used for metal chamfering and R-angle blade is rounded and chamfered for woodworking. Wide Application: This pneumatic chamfering machine can chamfer R/C angles, round holes, irregular edges, arcs, and straight edges on a variety of materials including steel, aluminum, copper, acrylic and wood.