Carbide Bur Grobet Made In U.S.A. Tree Radius 1/4X5/8X1/4 Double Cut SAVE $$$ BY CHECKING HOW LONG OURS LAST VS. THEIRS!!!! 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. .