Award-winning Ultra Smooth auger bits utilize a Tri-Cut design to create the cleanest holes in the industry. These bits have become a staple among timber framers, pole barn builders and woodworkers. Unmatched performance enhanced by a resin-based coating to dissipate heat and clear out the stickiest chips. Lightweight design extends tool and battery life. 7/16" quick-change shank. 18" OAL. 1-1/2" DIA.