Handpiece Body AR Daring design with rounded lines Made of brass with smooth chrome-plated treatment Autoclavable up to 135ºC Borden/Midwest type connection Triple Spray Distributed symmetrically in the direction of the bur tip Rotation 420.000 RPM Working Air Pressure Between 32 and 35 pounds (psi) Ideal Weight Net weight under 58.0 grams Low Working Noise Bur Fastening System Burs fastened by friction (Friction Grip system) resistant to traction, which ensures the locking of the bur.