The new NailBiter augers were specifically designedto quickly and smoothly cut through nail-embedded timbers speeding the installationof wires in any wood construction. These new bits make clean, smooth bores perfectfor installing NM wire, armored cable or rigid conduit.In side-by-side testing, conducted by independent laboratories, the NailBiter augersoutperformed all leading competitors. The NailBiter was designed by electriciansfor electricians with features and benefits that deliver more holes per dollar thanconventional augers!n Precision-ground lead screw and cutting edges provide fast, reliable startsand smooth pulling action through timber.n Oversized cutting head creates a hole slightly larger than the auger body,enhancing operator control and easing bit removal from timber.n Dual-helix cutter heads provide twice the cutting surface per rotation soless effort is needed to cut through tough wood. The bit makes smooth,balanced cuts through knots, nails and staples.n Unique 60 cutting angle on leading edge cleanly and quickly shearsthrough wood and nails.n Fits auger bit extensions for long-reach drilling.n Full black oxide finish increases rust resistanceand reduces friction.