AIR ANGLE DIE GRINDER KIT 3MM&6MM COLLET2 COLLETTS 3MM& 6MM-10X GRINDING STONESSPEES 20000RPM AIR CON 3.5 CFM @ 90 PSIAir Angle Die Grinder Kit with 3mm and 6mm Collets, featuring two colletts for working with 3mm and 6mm tools, respectively. The kit includes 10x grinding stones and operates at a speed of 20,000 RPM, powered by an air compressor that delivers 3.5 CFM at 90 PSI.