Best Step Drill Bit (2026): 5 Picks for Sheet Metal and Wood

A bracket hole lands in the wrong spot, or a panel needs a hole a little wider than the bit in the chuck. Swapping through a full drill index takes time, and a twist bit leaves a ragged edge in thin sheet. The best step drill bit fixes that job with a single bit: each step cuts a clean, larger hole, so the size grows as the bit goes deeper.

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Picks for the garage

#	Product	Shop Score	Buy
1	Jerax tools 1/4"-1-3/8" M2 Step Drill Bit Unibit	9.6/10	Buy on Amazon
2	Jerax tools 1/4" - 2" HSS Step Drill Bit Unibit	9.5/10	Buy on Amazon
3	Step Drill Bit Set - 5PCS Titanium HSS Step Bit	9.5/10	Buy on Amazon
4	NEIKO 10185A Step Drill Bit	9.5/10	Buy on Amazon
5	ZELCAN 10 Sizes Titanium Step Drill Bit	9.4/10	Buy on Amazon

1

Jerax tools 1/4"-1-3/8" M2 Step Drill Bit Unibit

Jerax tools·9.6/10 Shop Score

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The Shop Score runs from 9.2 to 9.8 and weighs performance (35%), build (25%), value (25%), safety (10%, where it applies) and warranty (5%), using only what the manufacturer and the listing publish. How we pick ›

An M2 high speed steel step bit with 5 marked sizes from 7/8 to 1-3/8 inch, nitride hardening and a tri-flat shank, rated for stainless steel to 12 gauge.

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Pros

• M2 steel with vacuum heat treatment and nitride hardening
• Cuts stainless steel to 12 gauge, 2.7mm thick
• Polished steps with size highlights visible while drilling
• 3/8 inch tri-flat shank locks in 3-jaw chucks

Cons

• Title range starts at 1/4 inch, marked sizes start at 7/8 inch
• Not made for sockets or impact drivers
• No warranty term is stated
• 5 sizes only, no small holes under 7/8 inch

2

Jerax tools 1/4" - 2" HSS Step Drill Bit Unibit

Jerax tools·9.5/10 Shop Score

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The Shop Score runs from 9.2 to 9.8 and weighs performance (35%), build (25%), value (25%), safety (10%, where it applies) and warranty (5%), using only what the manufacturer and the listing publish. How we pick ›

A high speed steel step bit with 10 marked sizes from 1/4 to 2 inches, a self-starting split point and a tri-flat shank, with no pilot hole required.

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Pros

• 10 marked sizes from 1/4 to 2 inches
• Self-starting, non-walking split point, no pilot hole required
• Polished steps with size highlights visible while drilling
• 3/8 inch tri-flat shank locks in 3-jaw chucks

Cons

• No stainless steel cutting is stated
• Not made for sockets or impact drivers
• No warranty term is stated
• No stated split point angle

3

Step Drill Bit Set - 5PCS Titanium HSS Step Bit

SEDIANAS·9.5/10 Shop Score

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The Shop Score runs from 9.2 to 9.8 and weighs performance (35%), build (25%), value (25%), safety (10%, where it applies) and warranty (5%), using only what the manufacturer and the listing publish. How we pick ›

A 5 piece titanium-coated step bit set with 50 sizes from 1/16 to 1-3/8 inches, a 118 degree split point and two spiral flutes, for metal, aluminum, wood and plastic.

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Pros

• 50 sizes across 5 pieces, 1/16 to 1-3/8 inch
• 118 degree split point tip, self-centering
• Two spiral flutes clear chips faster
• Titanium coating resists heat, corrosion and rust

Cons

• Not recommended for stainless steel or harder metal
• No warranty term is stated
• No stated shank size
• No stated chuck fit

4

NEIKO 10185A Step Drill Bit

NEIKO·9.5/10 Shop Score

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The Shop Score runs from 9.2 to 9.8 and weighs performance (35%), build (25%), value (25%), safety (10%, where it applies) and warranty (5%), using only what the manufacturer and the listing publish. How we pick ›

A 12 step titanium nitride coated bit in #4241 high speed steel, with a 135 degree split point, two flutes and a 3/8 inch tri-flat shank, for steel, metal, wood and plastic.

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Pros

• 12 sizes in a single bit, 1/16 to 7/8 inch
• 135 degree split point tip prevents walking
• Two flutes deburr and expand holes while drilling
• 3/8 inch tri-flat shank grips better with less wobble

Cons

• Title range starts at 3/16 inch, size list starts at 1/16 inch
• Bullets call the flutes both spiral and straight grooved
• No warranty term is stated
• No stated thickness limit for steel

5

ZELCAN 10 Sizes Titanium Step Drill Bit

CO-Z·9.4/10 Shop Score

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The Shop Score runs from 9.2 to 9.8 and weighs performance (35%), build (25%), value (25%), safety (10%, where it applies) and warranty (5%), using only what the manufacturer and the listing publish. How we pick ›

A titanium-coated high speed steel step bit with 10 sizes from 1/4 to 1-3/8 inches and a tri-flatted shank, for iron, aluminum, copper, plastic and wood.

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Pros

• 10 sizes from 1/4 to 1-3/8 inch in a single bit
• Titanium coating resists heat, corrosion and rust
• Tri-flatted shank fits the chuck and stops slip
• Two-flute design clears chips faster

Cons

• Excludes steel and harder metal
• No split point angle is stated
• No warranty term is stated
• No stated thickness limit

Compared on paper

Specs such as CFM, PSI and torque are the manufacturer’s ratings as listed, collected 11 November 2026. Where a listing contradicts itself, both figures are shown.

How the points were given

Each step bit is scored on performance, build, value, safety and warranty, with the weights published on the How We Pick page. No bit here states a safety listing such as UL, ETL or CSA, so every pick scores zero on safety, and none of the 5 listings states a warranty term, so warranty scores zero across the guide and the ranking comes from performance, build and value.

Shop Scores range from a low of 9.2 to a high of 9.8, with each tool positioned by its weighted points proportionally, and more points always yields a higher score.

What the listings tell you

5 step drill bit listings were compared. 2 state a split point angle, 118 and 135 degrees. 3 state a tri-flat shank, and 2 state stainless steel cutting. None states a warranty term, and none states a safety listing. 2 listings contradict themselves on sizes or flute design, and both are flagged in their reviews.

Buying guide: the best step drill bit

Size range and steps

Steps decide how many holes a single bit drills. The SEDIANAS set covers 50 sizes from 1/16 to 1-3/8 inch across 5 pieces, the NEIKO covers 12 sizes from 1/16 to 7/8 inch, and the Jerax 2 inch bit covers 10 marked sizes to 2 inches. Match the range to the largest hole the job needs, and check the marked sizes, not just the title range: the Jerax M2 title starts at 1/4 inch while its marked sizes start at 7/8 inch.

Steel and coatings

Steel decides how long the edge lasts in metal. The Jerax M2 bit states M2 high speed steel with 50% more tungsten and 150% more molybdenum, plus vacuum heat treatment and nitride hardening, and it is the only pick that states a stainless cut to 12 gauge. The other bits state high speed steel with a titanium or titanium nitride coating, and the SEDIANAS and ZELCAN bits both exclude stainless steel. For stainless work, see the titanium vs cobalt drill bits guide.

Split point and flutes

A split point tip starts the hole without walking, and flutes clear the chips. The SEDIANAS states a 118 degree split point with two spiral flutes, and the NEIKO states a 135 degree split point with 2 flutes that deburr as they drill. The Jerax bits state a self-starting, non-walking split point with polished steps, and the ZELCAN states a two-flute design that clears chips faster. Where a listing calls its flutes both spiral and straight, as the NEIKO does, treat the flute claim with care.

Shank and chuck fit

The shank decides whether the bit holds in the chuck. The NEIKO, Jerax M2 and Jerax 2 inch bits all state a 3/8 inch tri-flat shank that locks in any 3-jaw drill chuck with 3/8 inch, 10mm, or larger capacity, and the ZELCAN states a tri-flatted shank that fits the chuck and stops slip. The SEDIANAS set states no shank size. The Jerax listings also warn against sockets and impact drivers: a high-torque impact wrench can chip the cutting edges or crack the bit.

Wood, plastic and sheet metal

All 5 bits state wood and plastic cutting, and all state sheet metal of some kind. The difference is stainless: NEIKO and Jerax M2 state it, SEDIANAS and ZELCAN exclude it, and the Jerax 2 inch bit states nothing on stainless. For general drilling, see the best drill bit set guide. Wear eye protection when drilling metal, and keep the work clamped so the bit cannot grab and spin the piece.

Garage Fit Check

• Check the chuck capacity before buying: the Jerax bits need a 3-jaw chuck with 3/8 inch, 10mm, or larger capacity.
• Check the marked sizes on the bit, not the title range, before the first hole.
• Keep the set in its case: the SEDIANAS set has 5 pieces and 50 sizes to keep straight.
• Confirm the material before drilling: SEDIANAS and ZELCAN exclude stainless steel and harder metal.
• Keep impact drivers and sockets away from these bits; the Jerax listings warn they can chip the edges or crack the bit.

FAQ: garage tools

How does a step drill bit work?

Each step on the bit cuts a larger hole, so drilling deeper widens the hole without changing bits. The split point tip starts the hole, and the flutes clear chips as each step cuts.

How do I use step drill bits?

Chuck the bit in a drill, start the hole at the smallest step and drill deeper to reach the marked size. The Jerax bits show the target size on polished steps, so there is no need to stop and check mid-drill.

How do I use a step drill bit on wood?

Use the same steps as for metal: start at the smallest step and drill to the marked size. All 5 bits here state wood cutting, and the NEIKO bit deburrs as it drills.

How do I use step drill bits for metal?

Clamp the work, start with the split point tip and drill at a steady pace, letting each step cut before moving deeper. For stainless steel, use the Jerax M2 bit, which states a cut to 12 gauge with appropriate pressure.

How do I remove a stuck drill bit?

Stop the drill, reverse the chuck by hand and pull the bit straight out of the hole. If the bit is wedged in the chuck, open the chuck jaws fully and tap the chuck body lightly to free the jaws. A tri-flat shank, as on the NEIKO and Jerax bits, grips the chuck and is less likely to spin and wedge.

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