SOMADA Auger Drill Bit Set for Wood, 4-Piece, 1/2″, 5/8″, 3/4″ and 1″ Inch Size, 6-Inch Long Impact Wood Auger Set with Quick Change 4-Flute design with screw-point tips for easy to start self-feed drilling pointFour cutting spurs for faster chip clearance and cuttingCommonly used diameter sizes makes perfect for many DIY projects. 1/2″, 5/8″, 3/4″ and 1″ diameter sizes included. Each bit is 6.5″ long.1/4″ quick change shank fits standard chucks and impact drillsGrooved hex shank prevents slipping in drill chuck. Whether you are a plumber or electrician or a DIYer. This jobber drill bits set is handy to have in your tool kit. Get that project done!