150, 220, 320, 400, 600 Specialty Polishing Stone · Treated Aluminum Oxide · Hard Structure with Slow Breakdown This specially treated hard aluminum oxide finishing stone cuts very fast and yet provides a silky, smooth finish. Even the most selective polishing 'pro' will like T2 for high quality mold steel such as P-20, H-13, and 420 stainless. It can be used either by hand with one of our Hand Holders or with reciprocating profilers like our U-Lap and Turbo-Lap Air Profilers. Must be used with a lubricant to prevent stone loading. Try our Premium Stoning Oil or BORI-LUBE 10! Available in 150-1200 grit and a wide variety of sizes. Also available in regular and fine grit kits.