3/4 3M Micron Radial Disc Polishing Kit w/3/32 + 1/8 Mandrel Set Jewelry Metal Finishing Cleaning Polishing Tool This polishing set includes one 3/32" and one 1/8" stainless steel shank mandrel, along with 21 total of 3M radial discs that measure 3/4" Includes 3 of each disc grit in pink, peach, light green, yellow, white, red, and blue These 3M Radial Bristle Discs are embedded with a long-lasting abrasive material which eliminates the need for messy compounds Maximum speed is 30,000 RPM The included mandrels are ideal for rubberized abrasives and buffs