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Your cart is empty. Four Spiral Flute Cobalt Step Drill Bit, 1/4"-3/4" Wear-Resistant TiAlN Coated Unibit Step Drill Bit, Industrial Grade HSS Step Bit, 1/4" Hex Shank Step Bit for Metal, Stainless Steel, Aluminum, Wood, Plastic
The Features of Step Bit:
135° Split-Point Tip - With a 135° split-point tip and four spiral flutes, which can provide smooth drilling, allowing you to cut faster in using. This also ensures you get a sharp cut on a variety of materials.
Widely Application - 9 size in one step drill bit, the step bit contains a variety of specifications to meet your drilling holes needs. The step drill bits can work on stainless steel, metal sheet, aluminum sheet, wood, plastic ect.
Warm Tips - It's better to use cutting fluid or lubricant to reduce friction and heat when drilling harder materials. Water should be added to cool the drill bit When drilling large diameter holes, which can extend the service life of the step drill.
Specification:
Rank: Industrial grade
Duty: Heavy Duty
Size: 1/4"-3/4" (9-Step)
Material Steel: M35 Cobalt HSS
Shank:1/4" Hex shank
Cutting Blades:4-Spiral-Flute
RoobRL
Reviewed in the United States on February 4, 2025
I never had or used a stepped drill bit like that. I was impressed by the quality and usefulness of it. I needed a relief hole in my siding for a ground wire nut. I user this drill bit, by hand, not even on a drill it cut right through and with couple of turns got the hole to the diameter I needed. This is a great tool for relatively thin metal or softer materials. Saves me from carrying a bunch of drill bits and switching between them to get the right hole size.At least initially the materials and workmanship, very useful.
The Big 0
Reviewed in the United States on February 17, 2025
These really dig into the metal. If you have never used one, be careful, as you will exceed your preferred hole diameter quickly. For around the garage, this bit functions as advertised. Good value for the money.Well done!
Mitch M
Reviewed in the United States on January 23, 2025
This is a pretty aggressive bit. Having 4 flutes means it's cutting way more than a standard 2 flute bit. It will stall out a small 12v impact driver, but a larger impact is not an issue. Cuts a nice clean hole comparable to any other step drill. I haven't used it enough times to comment on its longevity yet however.
John Rowell
Reviewed in the United States on December 29, 2024
I found this bit to be sharp and eager to cut, with the flutes doing a good job of removing material. The spiral design of this step bit, along with the lack of clearly defined steps, does make the bit eager to dig in - the plus side is you don't generally have to apply much pressure, if any, while drilling, as the bit just bites in as it goes, but the down side is you have to be careful and quick to stop it before it enlarges the hole too much. So, apply minimal pressure and take it slow, letting the bit do the work - it's easy enough to enlarge the hole a little at a time, but not easy to reduce the size of a hole when it gets too big!
Mike Calimari
Reviewed in the United States on November 29, 2024
We used this to enlarge holes in a blow molded Xmas tree for decorative lights.In a couple of instances the bit dug in and cracked the thin plastic.We have yet to test this bit on other materials but I recommend caution if using a hand held drill.Best use would be a drill press with a depth limiter.
Elias Mackoukji
Reviewed in the United States on November 15, 2024
Buena calidad, y perfora el acero cómo mantequilla!!!
J. Donch
Reviewed in the United States on November 11, 2024
Be careful if drilling into thin, soft material like Tail piece drain, plastic or Corian. This is very sharp and, if working "freehand," without a drill press to limit the travel, once it "breaks through" the material it acts like a screw and will pull the drill bit down, resulting in possibly overcutting the hole beyond the intended diameter.I wanted to drill into a new vanity drain to put in a saddle Tee for attaching the HVAC condensate drain. I am glad I decided to practice on some scrap drains. I found when drilling freehand, the bit wandered so, after I drilled a small pilot hole, the bit went in so rapidly, pulling itself down so rapidly that I had a problem controlling the depth and overshot the 1/2 mark I had intended. The individual "steps" are very short (about 1/16-inch), and it is also hard to see the intended diameter. So, once starting use a very slow and very light touch. In soft material you do not need any pressure once started (I Actually had to hold it back).Unlike a drill press and, without having a way to control the depth you just have to be very careful and slow when cutting into thin or soft material (but it is a little easier with thin metal). When drilling into thicker material such as wood or a Corian counter, it is much easier to control. However, the resulting hole will have a cone shape which is not very useful. By drilling out the backside I was able to reduce the amount of material I then had to ream out but, the extra work sort of defeats the purpose of using this over a normal drill bit of the proper size.I guess there is no "one size fits all." Each tool has its individual uses with strengths and weaknesses however, for its purpose and low cost, this is an excellent drill bit if used judiciously and carefully.
Devyn
Reviewed in the United States on October 27, 2024
Finally got around to using this bit and we all know that tingly feeling you get when using a sharp bit, well unless it shatters into pieces before completing a single revolution like this one did. It felt oddly similar to taking a bill out of your pocket and lighting it on fire like you never even had it in the first place, but maybe its just me.
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