General description US PRO AIR DIE GRINDER is a versatile tool designed for polishing and sanding applications. With its right angle design, it allows for easy access to tight spaces, making it ideal for professional use. Technical specifications Free Speed (RPM): 20,000 Average Air Consumption: 4 SCFM (25%) Collet Size: 1/4" (6mm) Air Pressure: 90 psi (6.3 KG/CM2) Air Inlet: 1/4" BSPT Weight: 0.5 KGS