Color-coded grits: yellow - 80 grit, green - 240 grit, blue- 600 grit. Once you try these unique polishing bits, they'll become your favorite tool for removing just about any distraction from metal workpieces. The diamond-in-rubber emery-type compound is a very efficient abrasive - the rust & oxidization was removed from a steel bar in about 10 seconds with a small 18VDC grinder. The result is a smooth, polished surface that's ready for painting or other finishing. The compound is also quite durable but does wear with use so we suggest keeping an extra set on hand. Also - don't let a friend borrow them or you'll never see them again!
