“IRWIN” HD JOBBER DRILL BIT Bit is constructed of M-2 high speed steel for strength, heat and wear resistance and used for general use in wood, metal, and plastic. The 135 degree spli
“IRWIN” HD JOBBER DRILL BIT Bit is constructed of M-2 high speed steel for strength, heat and wear resistance and used for general use in wood, metal, and plastic. The 135 degree spli