10 Best Step Drill Bits 2025 in the United States

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 IRONANT Step Drill Bit Set offers a solid choice for those needing versatile drill bits for light to medium metalwork and DIY projects. Made from high-speed steel (HSS) with a titanium coating, these bits promise good sharpness and durability, which helps them stay sharper longer than regular bits. The set includes 5 pieces with a total of 50 size steps, making it flexible enough to handle a wide range of hole sizes without needing multiple individual bits.

The straight shank design fits most standard drills, and the 118° split point tip combined with a spiral dual-flute design helps speed up drilling while preventing the bit from slipping or wandering off target. It also clears metal chips efficiently, which keeps the drilling smooth. The bits work well on materials like plastic, aluminum, and softer metals, but they are not suitable for tougher metals such as stainless steel, which limits their use if you often work with harder materials.

The included aluminum case is a nice touch, keeping the bits organized and easy to store. If you want a reliable, multi-size set for general metal and plastic drilling tasks, this set is convenient and performs well. However, if your projects require drilling harder metals or very precise holes, you might need to look for bits designed specifically for those tougher conditions.

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.