KLEIN Step Drill Bit #3 Double Fluted 1/4" to 3/4" KLEIN Step Drill Bit #3 Double Fluted 1/4" to 3/4" Item #: KTSB03 Available For Backorder $32.99 Qty: Backorder Add to WishlistAdded to Wishlist | Add to CompareAdded to Compare View full details Main Features Two flutes cut faster and keep bit cooler. Fast-starting, non-walking drill tip. High-visibility silver targets for primary hole sizes. Thick 3/8” hex shank won't round out in the drill chuck for a more positive grip. 9 hole sizes.