HSS, 12 Inches Aircraft Extension Drill Bit, Size: R, Dec. Equivalent .3390, Flute Length 3-7/16, Overall Length 12 Inches --- While we are happy to sell this product in any quantity you desire, we prefer this item be purchased in multiples of 6 in order to not break product packaging.
  • High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance
  • Black oxide treatment adds lubricity and creates small pockets on the surface of the tool that act to hold coolant near the cutting edge
  • When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging
  • Manufactured to National Aerospace Standard 907
SizeR x 12"

"R" x 12" HSS Aircraft Extension Drill Bit, Qualtech, DWDA/CX12R


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