3" Speed Chips' ceramic bond quickly removes scratches left behind by metal-bond diamonds with a very subtle scratch pattern. The Speed Chip is a transition ceramic that can be used as a complete system with the Boomerang Resins or only the 100 Grit Speed Chip as a transition from metal abrasives to resins. Sold in a box of 9 and are Hook and Loop backed to mount to Hook and Loop pad drivers. They are designed to be used three per driver although, on extremely hard concrete, the quantity per driver can be reduced to two for max down pressure. Available in 50 and 100 grit.