Power Drill Power Pole Auger Bit, 9 16 in X 29 in ORS NASCO Color coded for gas service to Color coded for gas service to provide added safety Internal check valves designed to prevent reverse flow and accidental mixing of oxygen and fuel gases Torch and regulator models provide downstream and upstream protection 10 in maximum cutting capacity For stopping flashbacks by preventing ignition of mixed gases and to protect equipment such as hoses heavy use or stopping to clear chips Extra long twist is ideal for boring large poles and for multiple timber applications All bits feature 7 16 in adaptable hex shank Simply remove it to use round shank Full length heat treatment guards against bending in heavy duty applications and strengthens the twist where the greatest strain occurs