Double Fluted Step Drill Bit for Cutting Metal Hole 19 Sizes from 3/16 to 1-3/8 inch, Genuine High Speed Steel

DURABLE & STURDY: Solid M2 high speed steel construction for extra durability, the unique thick 3/8 inch hex shank prevents slip in drill chuck and reduces shocks, for a more positive grip
HIGH PERFORMANCE: Double-Fluted Step Drill Bits provide faster cutting and drilling than single flute bits, it is optimized for cordless drills in high speed provides greater speed and control
CONVENIENT & ACCURATE: Easy-to-read step rings save time when drilling common holes, laser-engraved marks, offer superb convenience and accuracy, for fast, easy hole size identification