NEW Klein Tools KTSB11 #11 Step Drill Bit These 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 in. hex shank provides a firm, positive grip and won’t spin out in the drill.1.125 in double flute bit offers faster cutting and drillingEasy-to-read step markings take less time to drill holesHigh-speed steel construction ensures durability2 flutes cut faster and keep bit coolerFast-starting, non-walking tipHigh-visibility silver targets for primary hole sizes9 hole sizes ITEM is Brand NEW and factory sealed.If any questions, feel free to reach out- I will get back to you as soon as I can.