1 3/8" core bit polishing drum 8 Piece + 1/2" demi bullnose router bit stone
Grinder or polisher speed must be lower than 6500 RPM when using with them. (a)1 Piece of 1 3/8" / 35mm Diamond core bit / hole saw for ston concrete (with 5/8"-11 Thread arbor). (c)7 Pieces of 1 3/8" / 35mm Diamond Wet Polishing Drum.