High Performance: Upgraded beveling grinder with hightoquality bearings and blades for smoother deburring and chamfering. Triangular tungsten steel cutter heads, chamfer Rtoangle or Ctoangle, 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 or 4 Inch, and the depth is 0.1mmto0.9mm. 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 45todegree 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 andamp R Angle: C Angle blade is angular, mostly used for metal chamfering and Rtoangle blade is rounded and chamfered for woodworking. Wide Application: This pneumatic chamfering machine can chamfer R or C angles, round holes, irregular edges, arcs, and straight edges on a variety of materials including steel, aluminum, copper, acrylic and wood.