Professional contractors rely on DEWALT® self-feed wood-drilling bits when they need to bore holes 1" or larger for pipes, cables, and ductwork. Select sizes of these ultra-heavy-duty bits feature a triple-cutter design that delivers long life, minimal binding and fast chip ejection. An aggresive self-feeding screw-tip pull the bit easily through the toughest materials. Standard 7/16" quick change shank allows for fast bit changes in quick change ready tools like the flexvolt 60V MAX** brushless