Professional contractors rely on DEWALT Power Ship Augers when they need to bore clean holes for wiring, pipes and more. These ultra-heavy-duty bits feature hardened dual cutting edges for durability against nail infested wood. Hollow center flutes eject chips quickly for fast cuts, while an aggresive self-feeding screw-tip pulls the bit easily through tough materials. Standard 7/16" Quick Change Shank allows for fast bit changes in quick change ready tools like the new 60V MAX BRUSHLESS CORDLESS QUICK-CHANGE STUD AND JOIST DRILL (DCD471) while preserving backward compatability with chuck based tools. Maximum initial battery voltage (measured without a workload) is 60 volts. Nominal voltage is 54 Available in sizes ranging from 5/8 in. to 1-3/8 in. diameter in both 6" lengths and 17" lengths.