Detailed Product Description TYPE27&TYPE42MATERIAL TYPEAPPLICATIONABRASIVEHARDNESSNormal SteelDe-burr, rough grind Brown A/ON. P. Q. R. SStainless SteelDe-burr, rough grind White A/ON. PCast Iron De-burr, rough grind White & Brown A/O N. PDuctileDe-burr, rough grind White & Brown A/O N. PAlloy, AluminiumDe-burr, rough grind White & Brown A/O N. PCopperDe-burr, rough grind White A/O & Silicon ...