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 Milwaukee 48-89-9291 3-Piece Cobalt Step Drill Bit Set is designed to handle a variety of drilling tasks with precision and durability. Made from cobalt, these bits are highly durable and can stay sharp for longer periods, making them ideal for heavy-duty use. The set includes three bits (#1, #4, and #9), each with multiple steps to accommodate different hole sizes, which adds versatility to your toolkit.

The dual flute design helps in quicker and cleaner drilling by removing chips efficiently, while the rapid strike tip ensures a fast start with minimal wear and tear. The laser engraving on the bits makes it easy to identify sizes, saving you time during work. Additionally, the 3-flat secure grip shanks prevent the bits from slipping in the drill chuck, providing a stable drilling experience.

However, it's important to note that the Milwaukee bits come with a straight shank and are uncoated, which may not be as versatile as other shank types and coated options available in the market. The uncoated finish might also affect the longevity and performance when drilling into harder materials. Despite these minor drawbacks, the Milwaukee step drill bit set is an excellent choice for both professionals and DIY enthusiasts, especially those who frequently work with metal and need durable, reliable bits.