We offer several sizes of auger bits to make your woodboring efforts quick and easy. The shorter bits are best-suited for installing j-lag hooks which only require a shallow bore. For full cabling efforts and installation of threaded rod, we have longer bits so you can drill straight through the tree in one pass. All sizes of bits have a cutting spur to assist in scribing the outside of the hole for a nice clean cut. The coarse screw tip allows quick penetration too.