Discs Diameter 1 Inch,Shank Diameter 3mm. Package include:48pcs Bristles disc+6pcs shank, total 54pcs. Mixed Grit: GREEN-50 grit, YELLOW-80 grit, GRAY-120 grit, RED-220 grit,BROWN-320 grit,BLUE-400 grit, 600 grit,CYAN 1000 grit. Bristles disc suit for deburring, cleaning, finishing and polishing detailed parts, tiny areas and irregular places more effectively with no scrach. These radial bristle brushes are ideal for jewelry making, hobby and craft, metalworking, wood carving and DIY making project. These detail abrasive brushes have good elasticity and toughness., Weight: 0.08598028218 pounds, Manufacturer: Prterver