Diablo Auger Bit DAG3110 1 Inch x 17 1 2 Inch (Self Feeding Dura Tip Dual Cutting Edge For Wood And Nail Embedded Timber Deep Hole Boring) Batteries 05 mm) Chuck Drive System 05 mm) Chuck Drive System Format SDS Plus Quick Change Chuck Safety Mechanism Integration KickBack Control Technology & Anti Vibration Handle Motor Drive System Type High Efficiency Brushless Motor Included Battery Capacity (2) CORE18V 4 the 30 098 delivers a glass smooth finish across hardwoods or copper pipe runs through residential floor joists this prevents excessive heat buildup and ensures the self feeding tip maintains its aggressive lead into the wood