Irwin 10231 Unibit 1 High Speed Steel Step Drill Bit 1 8" To 1 2" 13 Steps - 1 32" Increments By Irwin

Manufacturer

Unbranded

Single-flute cutting edge for greater control through steps, Hex shank prevents slipping in drill chuck, New SpeedPoint tip penetrates faster than previous Unibits and prevents walking, Ideal for drilling holes into thin materials like stainless steel, copper, brass, aluminum, plastic, Self Starting - 1/8" Maximum Material Thickness