Key Features Premium Diamond Reaming Solutions: Impregnated (IMP) & Surface-Set (SS) We mainly offer two types of diamond bits: Impregnated Diamond Reaming Shells(IMP R/M) Surface Set Diamond Reaming Shells(SS R/M) Cost-Effective & Standard-Compliant: Reaming Shells for Most Core Barrels These economical diamond-set reaming shells are available for use on most conventional and wireline core barrel assemblies of up to 152 mm (6 inches) in diameter. They are designed and