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Specialty Polishing Stone · Super-Fine Aluminum Oxide · Soft Structure with Fast Breakdown

Our 900-F aluminum oxide finishing stone has a super-fine structure and excellent breakdown properties for final finishing prior to mirror (diamond polished) finishing. The 900-F works especially well on P-20 mold steel with a hardness ranging from 29 to 32Rc as well as 420 stainless steel. The 900-F is primarily used for hand finishing operations. Check out our line of Hand Holders! Always use a lubricant such as our  Premium Stoning Oil or BORI-LUBE 10 with this stone.

Wide variety of sizes available including a triangle shape.

These helpful links will assist you in choosing the perfect finishing stone for your application:

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