The IRWIN Unibit #2M High-Speed Steel Metric Hole-Enlarging Step Drill Bit is ideal for drilling holes into thin materials, such as stainless-steel, copper, brass, aluminum, plastic and laminates. Each drill bit uses a single-flute cutting edge that gives a true, round hole and provides greater control through steps. The hex shank helps prevent slipping in the drill chuck. The #2M drill bit creates 4mm to 12mm holes with 5 steps.
UNIBIT 2M 5 Hole Sizes (4 mm - 12 mm), 2 mm Increments