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Your cart is empty. 15 Sizes Titanium Step Drill Bit, 4mm-32mm (3/16" to 1-1/4") High Speed Steel Step Drill Bits for Sheet Metal Hole Drilling Cutting, HSS Multi Size Unibit Drill Bits DIY Lovers, Multiple Hole Stepped up Bits
Two-Flute Design
Removes chips faster, lets particles escape easily, and allows for smooth cutting.
Accurate Drilling
Laser engraved sizes provides accurate positioning assistance for precise drilling.
Easy to Use
You can process different kinds of diameter holes in just one step, which greatly saves you a lot of trouble.
Wide Application
You can process different kinds of diameter holes in just one step, which greatly saves you a lot of trouble.
Specification:
Material: HSS
Size: 15 sizes
Surface: Titanium Coating
Drilling Sizes: 4,6,8,10,12,14,16,18,20,22,24,26,28,30,32mm (3/16",1/4", 5/16", 3/8", 1/2", 9/16", 5/8", 11/16", 13/16", 7/8", 15/16",1", 1-1/8", 1-3/16",1-1/4")
Multi-purpose: Perfect for home repairs and light jobs such as drilling holes in plastic, aluminum, copper, iron and many other types of sheet metal (excluding steel or any other harder metal).
Kindly Note:
1. When inject cold water while working, can effectively extend the service life of the drill bit.
2. It is recommanded that when using the step drill bit, the metal thickness is less 3 mm.
3. Made of HSS material, suitable for workpieces with hardness below 25 HRC.
DonS
Reviewed in the United States on March 6, 2025
TERRIBLE !!! Drilling a 28mm hole into plastic, it was melting the plastic instead of drilling, once I got my hole drilled, I threw the bit away, cheap terrible trash... I been using uni-bits for 30-yrs, this is brand new, & is worst than my dullest bit!!
Wade Ellisor
Reviewed in the United States on February 12, 2024
This is a piece of junk. I needed to enlarge 2- 1” holes to 1 3/16” (30mm) in mild 1/4” steel. I ended up using a round file to finish the job. This thing got thrown in the trash.
mike
Reviewed in the United States on June 24, 2023
I needed this to cut a hole in the center console of my vehicle in order install a USB 3.0 adapter to hook up to my aftermarket stereo for Android Auto/Apple Car Play. It worked like a charm. Had to take a few brakes along the way as the plastic was heating up quickly. No big deal though. It cut the hole as intended and I saved half to 3/4 of the money compared to what was available at Lowe's.
CESAR
Reviewed in the United States on May 20, 2023
I use this tool to drill on sheet metal and so far it has worked great, it is sharp and I love the feature that it fits my impact drill, no need for another regular drill.
EFL
Reviewed in the United States on May 1, 2023
I have half a dozen step drill bits and find them extremely handy. But I needed one with a bit larger diameter steps to enlarge a hole in a piece of mild steel. The item description said "Perfect for home repairs and light jobs such as drilling holes in plastic, aluminum, copper, iron........" So I ordered one. The price was excellent compared to what I saw in the big box stores. All I needed was to enlarge an existing hole in a few items.I chucked it up in my drill press. It didn't cut away even a few tiny chips. All it did was get hot. On a hunch I swapped in a U.S. made step drill whose largest diameter step is just a few millimeters smaller than what I need and it sliced metal chips exactly the way I expected this drill SHOULD have done.I've come to respect Amazon's willingness to take back an item that is substandard. So back it went.It might have been fine in aluminum, plastic or similar but
Kurt D.
Reviewed in the United States on September 28, 2022
I've been using this for a while, not much heavy use but enough to know these just does the job without a hassle. Comes in a nice case too. I really like that it has measurement markings to ensure the right sizing needed
digidoc664
Reviewed in the United States on August 1, 2022
Made it possible to get the exact size needed for the project. Sharp and easily controlled. Thanks!
Thibault M.
Reviewed in the United States on March 15, 2022
The tool is not sharp, cannot reliably drill 1/8’’ aluminium past 16mm diameter.
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