Features: Bronze Tempered (Bronze Oxide) Surface Treatment High Speed Cobalt Steel Tool Material ANSI ? Tap Standards 6D Usable Tool Depth to Diameter Ratio Drill Point 135 Cylindrical Shank / Straight Shank Right Hand Rotation / Cutting With a heavy duty design, recommended for use in difficult materials and applications, Precision Twist Drill M51CO taper length drill bits are manufactured from Premium High Speed cobalt for drilling hard materials, including tool steel. With a 135 degree split point to help with self centering and reduce the push force needed, the drills also have a bronze oxide finish which prevents workpiece material from sticking to the cutting surfaces of the tool for clean and accurate holes. M51CO HSCo taper length drill bits are available in a range of fractional diameters, starting at 1/16 inch and going all the way up to 1 inch, in increments of 1/64 inch. Details: EAN number: 086071513618 EDP number: 051361 Product name ISO: M51CO61/64 Ordering code ANSI: M51CO61/64 Gross weight - grams: 762 Cutting diameter - fractional inch (DC): 61/64 Cutting diameter - inch (DC): 0.9531 inch Cutting diameter - millimeter (DC): 24.21 mm Length chip flute - fractional inch (LCF): 6.3/8 Overall length - fractional inch (OAL): 11" Overall length - inch (OAL): 11 inch Overall length - millimeter (OAL): 279.4 mm ANSI: M51CO61/64 ISO: M51CO61/64