Irwin 10220 Unibit Fractional Hole Enlarging Step Drill Bit #20 In Stock Features a prime quality zip

Features a prime quality zip that will protect its contents and a hang hole for easy display

Flexible PVC yet durable

Generates outstanding reflectivity and is metal flecked for longer life

Multiple layers of micron-sized moncrystalline diamonds bonded in nickel to a flat metal surface

Then with the tripod fixture you snap the head of the screw off

Irwin 10220 Unibit Fractional Hole Enlarging Step Drill Bit #20 In Stock Features a prime quality zip"IRWIN" ENLARGING STEP DRILL BIT Drills 9 16" to 1" holes in 1 16" increments. Has 8 steps on bit. High speed steel bit. Single flute cutting edge for greater control through steps. Cutting edge provides a true round hole. Three flatted shank (1 2")prevents slipping in drill chuck. Ideal for drilling holes into thin materials such asstainless steel, copper, brass, aluminum, plastic and laminates. Pilot hole required. Carded. WARNING: Cancer and