Introducing The Stepper drill bit by HydroFarm! This step drill bit will soon be your go-to tool as you break new ground in your garden. Drill 1/4-inch to 1-3/8-inch wide holes in 1/8-inch increments. It is heat-treated with a titanium nitride coating and features a double flute for easy control. Best of all, it is self starting - no walking or pilot needed! Set up grow systems with ease or quickly get up to speed on other home improvement projects with the HydroFarm HGDRBT step drill bit!