JoolTool 3M Scotch-Brite 4 Piece Deluxe Miniature Bristle Brush Kit Assembled with 1/8" Mandrel, 3 Ply, 1" Diameter Used for coarser but detailed work, the kit includes 4 of each grade 36 (dark brown), 50 (dark green), 80 (yellow), 120 (white) Use on metal: cleans firescale, heavy rust & metal castings, strips paint, etc Use on wood: removes and sets wood grain, sands, removes stain, ideal for freshly cut small carvings They come mounted on a 1/8" shaft for use in any of our handpieces Size: 1" diameter