Klein KTSB03 Step Drill Bit Double Fluted #3, 1/4 to 3/4"Klein KTSB03 Description 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'' hex shank provides a firm, positive grip and won't spin out in the drill. Klein KTSB03 Includes (1) Double Fluted Step Drill Bit Klein KTSB03 Features Two flutes cut faster and keep bit cooler Fast starting, non walking drill tip High visibility