10 Best Step Drill Bits 2025 in the United States

The IRWIN Step Drill Bit Set (10225) is a versatile 4-piece set designed for general-purpose use, making it suitable for both DIY enthusiasts and professionals. One of its standout features is the high-speed steel (HSS) material, known for its durability and long-lasting performance.

The set includes four of the most popular Unibit sizes, ensuring a wide range of applications, and the single-flute cutting edge provides precise, clean, and round holes, which is ideal for a smooth finish. Additionally, the laser-etched size markings make it easy to select the right drill bit, enhancing user convenience. The hex shank type offers a secure grip in the drill chuck, preventing slipping during use, and the SpeedPoint tip eliminates the need for a pilot hole, allowing for quick and efficient starts without 'walking' on the material.

The non-skid, self-starting tips further add to its reliability, minimizing the risk of skidding. Some users might find the limited number of steps a drawback if they require more precision in size options. Additionally, while the HSS material is robust, it lacks any additional coating that could extend the lifespan of the bits further, particularly under heavy-duty use. Given its features, this product is best suited for users needing a reliable and versatile step drill bit set for various drilling tasks.

The Milwaukee 48-89-9224 Step Bit 6-Piece Set is designed for users who need a variety of sizes to tackle different drilling tasks. This set includes six bits, ranging from #1 to #9, making it versatile for various applications. One of its standout features is its durability, thanks to the alloy steel construction, which offers long-lasting performance even in tough materials. The black oxide finish adds further protection against corrosion, enhancing the lifespan of the bits.

Users will appreciate the ease of handling these bits, which are designed to be user-friendly, making them suitable for both beginners and those with experience. The straight shank type allows for straightforward setup in drills, ensuring better grip and control during use.

In terms of practical application, this step bit set is ideal for DIY enthusiasts and professionals alike who need reliable bits for metal, wood, and plastic drilling. If you're looking for a solid, all-around step drill bit set with a good balance of size variety and durability, this Milwaukee set could be a great addition to your toolkit.

The NEIKO 10198A Step Drill Bit Set offers a solid choice for anyone needing a versatile tool to drill clean holes in metal, wood, and plastic. Made from high-speed steel with a titanium coating, these bits are designed to last longer and resist wear. The 135-degree split point tip helps the bits start drilling quickly and stay steady without slipping, which is great for beginners and ensures precision. The two-flute design efficiently clears debris, reducing heat and improving hole quality. With a tri-flatted straight shank, the bits fit securely in most drill chucks, preventing slipping during work.

The set covers a wide range of hole sizes (4mm to 35mm) spread across five bits, each with multiple steps, which means fewer bit changes and more convenience for drilling different hole diameters. However, managing multiple steps on one bit can sometimes be tricky if you only need a specific size, and the straight shank may not fit every specialized drill without an adapter. Also, while the titanium coating improves durability, it can wear off over time with heavy use on very hard materials.

If you want an affordable, reliable set for general purpose use in sheet metal, wood, and plastics, this NEIKO set performs well, especially for home projects or light industrial work.