The Milwaukee 48-89-9234 2-Piece #4 Step Drill Bit Set is an essential tool for professionals, contractors, and DIY enthusiasts who demand accuracy, speed, and durability when drilling holes in a wide range of materials. This premium-quality step drill bit set is designed for use with cordless drills, delivering up to 2X faster hole times, 4X longer life, and unmatched precision compared to standard step bits. With laser-engraved size markings that won’t wear off, a dual-flute design for smooth drilling, and a Rapid Strike™ tip for instant starts with no walking, this kit is the perfect solution for drilling multiple hole sizes with just one bit.
Overview
The Milwaukee #4 Step Drill Bit Set is crafted with custom-engineered, hardened steel and an advanced black oxide coating to resist heat buildup and wear, ensuring consistent performance over time. Each step bit is optimized for drilling in thin metals, stainless steel, aluminum, plastic, and other sheet materials, making it an ideal choice for electrical contractors, HVAC professionals, plumbers, and general fabricators. This set contains two step drill bits covering a size range from 3/16″ to 7/8″, allowing you to drill a variety of hole diameters without switching bits, saving time and increasing efficiency.
Key Features
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Dual-Flute Design – Reduces bit temperature, clears chips quickly, and provides a faster, cleaner cut.
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Rapid Strike™ Tip – Self-starting tip eliminates the need for pilot holes and minimizes walking, even on curved or uneven surfaces.
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Laser-Etched Size Markings – Permanent, easy-to-read markings ensure long-lasting visibility for precise hole sizing.
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Black Oxide Coating – Enhances durability, reduces friction, and resists corrosion, extending tool life.
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Optimized for Cordless Drills – Engineered to deliver maximum efficiency and longer run times on battery-powered tools.
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3-Flat Secure-Grip Shank – Prevents bit slippage in the drill chuck, providing better control and safer operation.
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Wide Step Range (3/16″ – 7/8″) – Offers multiple hole sizes with fewer bit changes, improving workflow speed.
Benefits
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Saves Time: Drill multiple hole sizes without needing to change bits.
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Professional Results: Clean, burr-free holes with minimal effort.
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Longer Life: Premium construction and coatings mean less frequent bit replacement.
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Reduced Effort: Dual-flute design allows smoother drilling with less force.
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Increased Productivity: Designed for cordless tools, so you can work faster and longer on a single charge.
Common Applications
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Electrical Work: Perfect for enlarging knockouts and installing conduit.
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HVAC Installations: Great for creating holes in sheet metal ductwork.
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Plumbing Projects: Ideal for plastic or thin metal pipe penetrations.
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Automotive & Fabrication: Useful for drilling custom holes in panels, brackets, and chassis work.
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DIY Projects: Excellent for home workshops where multiple hole sizes are needed quickly.
This Milwaukee 2-Piece Step Drill Bit Set is built for professionals who need speed, durability, and accuracy in one compact solution. Whether you’re drilling holes in metal enclosures, fabricating brackets, or working on an HVAC job site, these bits give you the performance edge you need.
Milwaukee® Step Drill Bits with JAM-FREE Performance feature a dual-flute design delivering up to 2X faster hole times, up to 4X longer life and up to 50% more holes per battery charge than competitors. Ideal for drilling small and large-diameter holes in steel and plastic, these bits are Optimized for Cordless Drills in High Speed. The Rapid Strike™ tip allows for a fast and accurate start that generates less heat, resulting in longer bit tip life. Black oxide coating also enhances durability, hole quality and bit life. For user convenience and accuracy, each bit has laser-engraved reference marks you can see while drilling. The 3-flat Secure-Grip™ shank ensures a solid connection with the drill chuck. The #3 Step Drill Bit has 9 hole sizes in 1/16″ increments ranging from 1/4″ – 3/4″. Jam-Free Performance in high speed with most professional 18 volt cordless drills with lithium-ion battery technology.
