T.C.T hole cutter loads only one-third cutting force, fast feed ... and long tool life Weldon shank & one touch shank T.C.T annular cutter T.C.T hole drill Tungsten carbide tipped hole drill Tungsten carbide ... cutter FEIN SHANK ANNULAR CUTTER NITTO SHANK ANNULAR CUTTER Material:T.C.T(tungsten carbide tipped) Surface treatment:TIN,TIALN,etc Diameter:12mm ...