Dimensions shown are in the following sequence: Head diameter, head length, shank size. EXPLANATION OF DIFFERENT CUTS THAT ARE AVAILABLE:STANDARD CUT: (STD) is most commonly used for general purpose deburring of steel, cast iron and other ferrous materials. DOUBLE CUT: (DBL) is basically a standard cut tool, with cuts made on the left hand spiral. This design produces a finer finish on material and reduces the size of the chips and slivers. It also gives greater tool control.