TREND RT72X12TC DOUBLED ENDED ROTATIP PROFILER 191MMX50MM Blade can be rotated 180 degree to give double the life of a conventional tool Cutter diameter of 191mm & bearing diameter of 1905mm Spare blade for Ref RT70 from January 2013 is ref RBT three hole Ref RT70 has single flute Ref RT72 has two flutes