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kennametal - round shank cutter bits & holders

C-1HDLR For planning concrete. Heavy duty design. Double angle carbide tip (.5 inch diameter) provides long tool life.	C-1HDSR For planing concrete. Heavy duty design. Double dome carbide tip (.5 inch diameter) provides long tool life. Short retainer.	CMM-4 Basic system bit. Double angle carbide tip prolongs tool life. Requires a CMM-4 snap ring retainer (included with bit).	C-21 For most cutting applications. Especially good in soft to medium-hard material. Carbide tip (.312 inches diameter) provides fast penetration.
C-31 For trenching, sawing, augering, and tunnel boring in soft to hard rock and concrete. Carbide tip (.374 inch diameter) and steel nose design provide strength and long tool life.	C-21HD Heavy duty design. For trenching, augering, and sawing in extremely hard rock and concrete. carbide tip (.5 inch diameter) provides long tooth life.	C-31HD Heavy duty design for trenching, sawing, augering, and tunnel boring in extremely hard rock concrete. Carbide tip (.5 inch diameter) provides long tool life.