1.375 in. High Speed Steel Double Flute Step Drill BitThese Double Fluted Step Drill Bits provide faster cutting and drilling than single flute bits. The easy to read step markings and targets save time when drilling holes. Thick 3 8 Inch hex shank provides a firm, positive grip and won't spin out in the drill. California residents see Prop 65 WARNINGS 2 flutes cut faster and keep bit cooler Fast starting, non walking tip High visibility silver targets for primary hole sizes 3 hole sizes Features Item