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Quick-Change Masonry Drill Bit Set, 5-Piece
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5/16" cobalt drill bit for hard metal - M35 cobalt drill bit by TTP HARD drills
5-16 Brad Point Drill Bit for Mushroom Plug Spawn use
DEWALT 5/16-in 6-in Titanium Nitride Coated Hss Jobber Length Twist Drill Bit in the Twist Drill Bits department at Lowes.com
5/16" HSS Black & Gold KFD Split Point Jobber Length Drill Bit, Killer Force Drill Bit | KFD5/16 | DrillsandCutters.com