26 Polishing Grinding Cratex Tools This is a new set of 26 assorted Cratex rubber polishing and grinding tools and 2 mandrels These are perfect for light deburring, smoothing and polishing of metal, plastic, glass and porcelain Each is made from a special formula of pure silicon carbide and oil-resistant rubber These abrasives can be shaped with conventional wheel dressers and they do not harden or soften during use or storage They fit a Dremel tool