Irwin Unibit step drill bits are ideal for drilling holes in just about any type of thin material. General purpose high speed steel Unibit step drill bits are perfect for use in mild steel, copper, brass, aluminum, plexiglass, wood, and laminate. titanium nitride coated (TiN) bits resist heat and friction, which extends the life of the cutting edge six times longer than standard step drills. Bits included are:

#1T (1/8"-1/2"), #2T (3/16"-1/2"), #3 (1/4"-3/4"), #4T (3/16"-7/8"), #5 (1/4"-3/8"), #9 (7/8" - 1-1/8"), #11 (7/8"), #20 (9/16"-1")

Non-paid members will be charged $12 for shipping, whereas paid members will receive free shipping!