Standard Abrasives™ Buff and Blend HS Discs High strength (HS) Buff and Blend material delivers the best results for light deburring and final finishing. Aluminum Oxide mineral cuts sharp, helps produce a consistent scratch pattern, and works well on many different metals. Center hole discs come in a range of medium to large sizes to meet many different project specifications. Three grades to choose from for varying degrees of aggressiveness and finish: Coarse (CRS - green), Medium (MED - blue), and Very Fine (VFN - maroon). Pack of 10