Best Step Drill Bit: Top 6 Unibits of 2026 Reviewed

Last updated on October 22nd, 2026.

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Concrete or wood, a well-equipped electrician can pierce through them if his toolbox includes high-quality step drill bits.

What can be worse than a dull step drill bit? Well, the same drill lost inside the wall. Using it on round surfaces is a nightmare too.   

Electricians need step drill bits that stay sharp and cut through different materials without producing sparks.

Precisely for these reasons, we’ve reviewed the Top 6 best Step Drill Bits of 2026.

Check our recommendations so you could avoid poor-quality bits. The market offers many options, so choose wisely.

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Top 6 Best Step Drill Bits (Unibits)

Milwaukee Step Drill Bit

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The Milwaukee Step Drill Bit is our top pick. Its double flute design drills smoothly, and the bit stays sharp through repeated use.

Made out of silver metallic, with a  black oxide finish, the Milwaukee drill bit performs well during high-speed drilling. No shards flying off the wall will jeopardise your safety. 

The bit weighs 4.8 ounces and has a dimension size of 3.9-inch x 0.1-inch x 4.9-inch. It’s able to drill holes the size of  7/8-inch to 1-1/8-inch. Plus, this bit lets you drill 2x faster. 

Electricians are particularly fond of this step drill bit due to the fact that it does not produce too much heat when used so no sparks flying around. 

It drills 50% more holes per battery charge, and its durable design helps the bit stay sharp for longer.

No matter what cutting project are you working on, we strongly believe the Milwaukee step drill bit is the best choice for you. 

Dewalt Step Drill Bit

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Our premium choice is the step drill bit offered by the most popular name in the electrical industry, Dewalt. The 3-piece set is particularly preferred due to the bits’ capability to cut through stainless steel. 

Designed for multi-diameter hole drilling, the Dewalt Step Drill Bit is an important tool when it comes to installing LEDs or toggle switches into aluminium or other metals. It works perfect on plastic as well. 

The titanium two-flute spiral design makes the bit easier to remove and helps it last longer. This bit was made for impact drivers so you will drill in precise holes. 

Another great feature is the offset design present on each step so your bits’ steps will stay sharp longer than other models. The laser engraved numbers are easy to see. 

Due to the fact that the Dewalt drill bits can be used on both plastic and metal surfaces, there is no need to change the bits too often. 

The Dewalt Step Drill Bit is a versatile choice for electricians drilling through metal. 

Irwin Step Drill Bit

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We recommend the Irwin Step Drill Bit for its performance and value. The durable bit cuts clean, precise holes.

Featuring a single flute design, this bit can drill up to 12 hole sizes. It has the same bit in the 1/16” steps ranging from 3/16 to ⅞.

This pair of drill bits has laser etched sizes so they won’t break anytime soon. The bits work great on thin surfaces of stainless steel, aluminum, plastic, laminates and brass. 

The speed point tips were specially designed to pierce faster than other models. Also, they prevent walking. Moreover, these drill bits have three flatted shanks that prevent slipping on the drill chuck. 

If you are an electrician looking for an affordable drill bit that makes accurate cuts, the Irwin Step Drill Bit is the perfect choice for you. Make sure you get this pair. 

Lenox Step Drill Bit

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The Lenox Step Drill Bit has a non-rotating outer surface for safe, precise work on electrical enclosures. It also has a long lifespan.

It has a shank size of ⅜ inches that allows you to make deep cuts into materials. Also, its two-flute design creates burr-free holes. 

The tip of the bit is designed for faster drilling and prevents walking. Moreover, the steam oxide coating offers increased durability to the bits. 

Although the Lenox step drill bit works great on soft metal, it doesn’t have a good performance on stainless steel – it gets dull quickly. Drilling holes in air gaps or for sinks might prove difficult. 

Use these step drill bits with a strong drill motor and moderate feed pressure. Clear diameter markings help you drill accurately.

These Lenox step drill bits are an option to consider for electrical work. 

Klein Tools Step Drill Bit

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Our next favourite is the Klein Tools Step Drill Bit, a quick starting and non-walking drill bit. This drill bit offers great precision and it’s perfect for multitasking. 

Klein Tools Step Drill Bit includes 3 different hole sizes and also has a ⅜ hex shank that gives you a firm grip. This shank also prevents it from spinning out of the drill.

The drilling process is safe and efficient due to the two-flute design that cuts faster and keeps the bit cooler. Also, the silver targets for primary holes sizes are highly visible. 

A drawback of this step drill bit is the fact that it starts to dull out after 4 – 6 holes. If this happens, you need to replace it as soon as possible. 

However, similar to other Klein tools, the step drill bit is an awesome addition to any electrician’s toolbox. Highly performant, this bit is perfect for drilling even through stainless steel. 

Greenlee Step Drill Bit

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The last item we’ve checked out is the Greenlee Step Drill Bit, a durable and top-notch drill bit specially designed for electricians. 

The two-flute design reduces the force you need to drill holes. Moreover, the split-tip design is perfect for drilling holes in metal. This comes in handy when working on wire installations. 

The Greenlee step drill bit cuts through wood, brass, copper, aluminum and laminates. It makes fast, clean 5/8-inch, ⅞ inch and 1 ⅛ inch holes, with a design that removes chips efficiently.

Its steam oxide coating is another cool feature that improves durability. However, these step drill bits tend to dull out fast. 

Nevertheless, the Greenlee step drill bit gets the job done and is perfect for electrical work. As a responsible electrician, you might want to add this product to your shopping list.