Step Drill Bits
- IRWIN®Unibit™ #12 Titanium Fractional Step Drill Bit (15103ZR)Unibit™ #12 Titanium Fractional Step Drill Bit (15103ZR) by IRWIN®. IRWIN® 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...Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminatesSingle-flute cutting edge for greater control through steps$48.13
- IRWIN®Unibit™ #13T Titanium Fractional Step Drill Bit (15313)Unibit™ #13T Titanium Fractional Step Drill Bit (15313) by IRWIN®. IRWIN® 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...Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminatesSingle-flute cutting edge for greater control through steps$99.27
- IRWIN®Unibit™ #14 HSS Self-Starting Fractional Step Drill Bit (10314)Unibit™ #14 HSS Self-Starting Fractional Step Drill Bit (10314) by IRWIN®. IRWIN® 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...Single-flute cutting edge for greater control through stepsHex shank prevents slipping in drill chuck$58.65
- IRWIN®Unibit™ #1M HSS Metric Step Drill Bit (11101)Unibit™ #1M HSS Metric Step Drill Bit (11101) by IRWIN®. IRWIN® 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...Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminatesSingle-flute cutting edge for greater control through steps$20.81
- IRWIN®Unibit™ #1MT Titanium Metric Step Drill Bit (16101)Unibit™ #1MT Titanium Metric Step Drill Bit (16101) by IRWIN®. IRWIN® 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...Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminatesSingle-flute cutting edge for greater control through steps$27.13
- IRWIN®Unibit™ #1T Titanium Fractional Step Drill Bit (15101)Unibit™ #1T Titanium Fractional Step Drill Bit (15101) by IRWIN®. IRWIN® 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...Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminatesSingle-flute cutting edge for greater control through steps$35.04
- IRWIN®Unibit™ #2 Cobalt Fractional Step Drill Bit (10232CB)Unibit™ #2 Cobalt Fractional Step Drill Bit (10232CB) by IRWIN®. IRWIN® 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...6X Longer life vs. the competitionM35 grade Cobalt HSS$26.39
- IRWIN®Unibit™ #2 HSS Self-Starting Fractional Step Drill Bit (10232)Unibit™ #2 HSS Self-Starting Fractional Step Drill Bit (10232) by IRWIN®. IRWIN® 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...Single-flute cutting edge for greater control through stepsHex shank prevents slipping in drill chuck$20.81
- IRWIN®Unibit™ #20 Cobalt Fractional Step Drill Bit (10220CB)Unibit™ #20 Cobalt Fractional Step Drill Bit (10220CB) by IRWIN®. IRWIN® 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...6X Longer life vs. the competitionM35 grade Cobalt HSS$63.97
- IRWIN®Unibit™ #20 HSS Hole Enlarging Fractional Step Drill Bit (10220)Unibit™ #20 HSS Hole Enlarging Fractional Step Drill Bit by IRWIN®. IRWIN® 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...Single-flute cutting edge for greater control through stepsHex shank prevents slipping in drill chuck$41.25
- IRWIN®Unibit™ #21 HSS Fractional Step Drill Bit (10221)Unibit™ #21 HSS Fractional Step Drill Bit (10221) by IRWIN®. IRWIN® 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...Single-flute cutting edge for greater control through stepsHex shank prevents slipping in drill chuck$78.63
- IRWIN®Unibit™ #21M HSS Metric Step Drill Bit (11581)Unibit™ #21M HSS Metric Step Drill Bit (11581) by IRWIN®. IRWIN® 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...Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminatesSingle-flute cutting edge for greater control through steps$78.63
- IRWIN®Unibit™ #2M HSS Metric Step Drill Bit (11102)Unibit™ #2M HSS Metric Step Drill Bit (11102) by IRWIN®. IRWIN® 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...Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminatesSingle-flute cutting edge for greater control through steps$20.81
- IRWIN®Unibit™ #2T Titanium Fractional Step Drill Bit (15102)Unibit™ #2T Titanium Fractional Step Drill Bit (15102) by IRWIN®. IRWIN® 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...Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminatesSingle-flute cutting edge for greater control through steps$36.95
- IRWIN®Unibit™ #3 Cobalt Fractional Step Drill Bit (10233CB)Unibit™ #3 Cobalt Fractional Step Drill Bit (10233CB) by IRWIN®. IRWIN® 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...6X Longer life vs. the competitionM35 grade Cobalt HSS$59.80
- IRWIN®Unibit™ #3 HSS Step Drill Bit (3)Unibit™ #3 HSS Step Drill Bit (3) by IRWIN®. IRWIN® 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,...Single-flute cutting edge for greater control through stepsHex shank prevents slipping in drill chuck$111.41
- IRWIN®Unibit™ #3M Cobalt Metric Step Drill Bit (11103CB)Unibit™ #3M Cobalt Metric Step Drill Bit by IRWIN®. IRWIN® 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...6X Longer life vs. the competitionM35 grade Cobalt HSS$62.85
- IRWIN®Unibit™ #3M HSS Metric Step Drill Bit (11103)Unibit™ #3M HSS Metric Step Drill Bit (11103) by IRWIN®. IRWIN® 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...Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminatesSingle-flute cutting edge for greater control through steps$36.10
- IRWIN®Unibit™ #3MT Titanium Metric Step Drill Bit (16103)Unibit™ #3MT Titanium Metric Step Drill Bit (16103) by IRWIN®. IRWIN® 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...Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminatesSingle-flute cutting edge for greater control through steps$64.21
- IRWIN®Unibit™ #3T Titanium Fractional Step Drill Bit (15103)Unibit™ #3T Titanium Fractional Step Drill Bit (15103) by IRWIN®. IRWIN® 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...Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminatesSingle-flute cutting edge for greater control through steps$62.54
- IRWIN®Unibit™ #4 Cobalt Fractional Step Drill Bit (10234CB)Unibit™ #4 Cobalt Fractional Step Drill Bit (10234CB) by IRWIN®. IRWIN® 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...6X Longer life vs. the competitionM35 grade Cobalt HSS$54.15
- IRWIN®Unibit™ #4 HSS Self-Starting Fractional Step Drill Bit (10234)Unibit™ #4 HSS Self-Starting Fractional Step Drill Bit (10234) by IRWIN®. IRWIN® 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...Single-flute cutting edge for greater control through stepsHex shank prevents slipping in drill chuck$42.66
- IRWIN®Unibit™ #4MT Titanium Metric Step Drill Bit (16104)Unibit™ #4MT Titanium Metric Step Drill Bit (16104) by IRWIN®. IRWIN® 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...Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminatesSingle-flute cutting edge for greater control through steps$56.88
- IRWIN®Unibit™ #4T TIN Fractional Step Drill Bit (4T)Unibit™ #4T TIN Fractional Step Drill Bit by IRWIN®. IRWIN® 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...Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminatesSingle-flute cutting edge for greater control through steps$69.59
- IRWIN®Unibit™ #4T Titanium Fractional Step Drill Bit (15104)Unibit™ #4T Titanium Fractional Step Drill Bit (15104) by IRWIN®. IRWIN® 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...Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminatesSingle-flute cutting edge for greater control through steps$56.88
- IRWIN®Unibit™ #5M HSS Metric Step Drill Bit (11105)Unibit™ #5M HSS Metric Step Drill Bit (11105) by IRWIN®. IRWIN® 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...Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminatesSingle-flute cutting edge for greater control through steps$124.62
- IRWIN®Unibit™ #5MT Titanium Metric Step Drill Bit (16105)Unibit™ #5MT Titanium Metric Step Drill Bit (16105) by IRWIN®. IRWIN® 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...Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminatesSingle-flute cutting edge for greater control through steps$125.42
- IRWIN®Unibit™ #9 Cobalt Fractional Step Drill Bit (10239CB)Unibit™ #9 Cobalt Fractional Step Drill Bit (10239CB) by IRWIN®. IRWIN® 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...6X Longer life vs. the competitionM35 grade Cobalt HSS$88.70
- IRWIN®Unibit™ #9 HSS Self-Starting Fractional Step Drill Bit (10239)Unibit™ #9 HSS Self-Starting Fractional Step Drill Bit (10239) by IRWIN®. IRWIN® 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...Single-flute cutting edge for greater control through stepsHex shank prevents slipping in drill chuck$57.22
- IRWIN®Unibit™ 3-piece Black Oxide HSS Step Drill Bit Set (10502ZR)Unibit™ 3-piece Black Oxide HSS Step Drill Bit Set by IRWIN®. If you’re looking for a reliable solution to complete your project, this 1st-grade product is right up your alley. Designed utilizing the finest materials, it delivers...Designed to help to get your job done rightManufactured utilizing the highest quality materials$90.39
Step drill bits are widely used in plumbing and general construction to make round holes in soft materials. However, they can also be applicable for very thin stainless steel, aluminum, brass, copper and other metals. These versatile tools are particularly handy when it comes to enlarging holes that have already been drilled. A step drill bit features a unique staircase profile that allows it to cut holes of different diameters. It has a smaller pilot drill point that drills the initial small holes, and to be able to achieve the desired size of the hole it’s recommended to advance the drill bit further into the material. Step drill bits are usually coated in a titanium-nitride coating that helps minimize heat build-up, enhance surface hardness and ensure long-lasting service.
Whether you are a professional contractor, a plumber or a hobbyist working on your own construction project, high-quality step drill bits offered on our website will give you the reliability and versatility you need to perform your tasks as easily and effectively as possible. Now you can create perfect round holes, enlarge the existing ones or deburr holes left by other bits using only one tool – and that’s the step drill bit. Here, we carry a full line of first-rate step drill bits that are made from the sturdiest materials such as high-speed steel to bring the ultimate in performance and wear resistance. Most step drill bits showcased in our online store have a flatted shank or hex shank that allows to avoid slipping in drill chuck.