Pipe Bits Home » Products » Wood Drill Bits » Pipe Bits Nail resistant – double flute, double cutter with a side spur. For alignment and general construction work. PART NUMBERSIZEPIP 3/4″3/4″PIP 7/8″7/8″PIP 1″1″PIP 1 1/8″1.1/8″PIP 1 1/4″1.1/4″PIP 1 3/8″1.3/8″PIP 1 1/2″1.1/2″