31/32" DIAMETER. DECIMAL EQUIV-.9688 FLUTE LENGTH-3" OVERALL LENGTH-6" THIS DRILL BIT HAS THREE FLATTED SIDES ON THE 1/2" REDUCED SHANK . THIS ALLOWS FOR SUPERIOR GRIP IN THE DRILL CHUCK. MANUFACTURED FROM PREMIUM GRADE HIGH SPEED STEEL, KILLER FORCE DRILLS HAVE A HEAVY DUTY 135 DEGREE SPLIT POINT FOR SELF-CENTERING AND REDUCING THRUST. GOLD AND BLACK SURFACE TREATED FOR USE IN STAINLESS STEEL AND OTHER METAL DRILLING.