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MABLEVI 5 Pcs Four Spiral Flute Step Drill Bit Set, 1/8"-1-3/8" HSS Unibit Step Drill Bit, 1/4" and 3/8" Shank Step Bit for Metal, Stainless Steel, Aluminum, Wood, Plastic

  • Based on 87 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon

Arrives Thursday, Mar 19
Order within 6 hours and 44 minutes
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Features

  • Four Spiral Flute design ensures precise and accurate drilling. The four-flute step drill bit is smoother cutting than conventional two-straight flute step drills.
  • Constructed with HSS material ensures they stay sharp and sturdy through various projects. Surface Nitride Coating can keep sharp and prolong service life.
  • 5PCS different sizes/levels of step bits that you'll appreciate the versatility and convenience they bring to your drilling tasks. Say goodbye to the hassle of switching between multiple bits.
  • Having a solid case to keep the bits nice and sharp vs just rolling around with other metal bits. Very versatile, do-it-all kit.
  • If you're going for smooth and efficient these will blow through most Stainless Steel/Metal Sheet/Wood/Plastic/Aluminum Sheet/Copper and other metal sheets at high speed like butter.
  • Whether you're working on a big project or a quick fix, our step drill bits are your go-to tools. MABLEVI will repair and replace any defect, without charge, and without waiting.

Material: High Speed Steel (HSS)


Cutting Diameter: 1.38 Inches


Finish Type: Surface Nitride


Shank Type: Hex


Brand: MABLEVI


Material: ‎High Speed Steel (HSS)


Cutting Diameter: ‎1.38 Inches


Finish Type: ‎Surface Nitride


Shank Type: ‎Hex


Brand: ‎MABLEVI


Tool Flute Type: ‎Spiral


Point Style: ‎Split Point


Surface Recommendation: ‎Metal, Plastic, Stainless Steel, Wood


Number of Flutes: ‎4


Set Name: ‎MABLEVI 5-Piece Step Drill Bit Set


Unit Count: ‎5.0 Count


Manufacturer: ‎MABLEVI


Package Dimensions: ‎7.8 x 4.72 x 1.46 inches


Item Weight: ‎1.23 pounds


Item model number: ‎8edaff07-8d3e-4cb1-824d-fe06741e9dc0


Date First Available: ‎October 30, 2023


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Mar 19

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
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  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Exellent steep bit
Exellent product, I use this spirall unibits for a old fashion switch gear and I open more than 100 holes and still using it. Even lost the tip and still working
Reviewed in the United States on September 5, 2025 by Jorge E Ricardo Jorge E Ricardo

  • Works well on aluminum engine block
Delivered quick and on time, the driver was friendly. Exactly what I needed
Reviewed in the United States on February 16, 2026 by James Moore III

  • great quality
Its been like a year that i got them and i still using them the quality its really good
Reviewed in the United States on August 20, 2025 by Alejandro

  • Buen combo
Y cumple lo que propone
Reviewed in the United States on October 29, 2024 by Jeisson Stiven Contreras blanco

  • Good
Es un buen producto con buena calidad 👌
Reviewed in the United States on October 19, 2025 by El producto es lo que yo esperaba muy bueno y muy resistente muy bueno calidad y muy fácil de amar

  • Great set!
Good quality and glad to find these to add to my set of drills at a price that can't be beat.
Reviewed in the United States on June 1, 2025 by Sue B.

  • Buen producto
Exelente
Reviewed in the United States on May 26, 2025 by Yannier Tamayo Cruz

  • Bit broke within 10 seconds of unpackaging!
First time using these, I inserted the smallest of the bunch into my drill and attempted to open up a hole I had drilled in a piece of aluminum square tubing. Within about 10 seconds of using this bit for the first time out of the package, the entire tip just snapped off. This was on ALUMINUM tubing only 1/8" thick. I mean, this might be the softest and thinnest material I could've possibly came up with to test these out and it didn't last me 10 seconds. I own a mobile welding business and need my tools to be reliable. I can't be out on a job relying on the stuff I have to help get people out of bad situations, and have them let me down. Also, if that bit broke on something that soft and thin, how are they gonna hold up when I need them to get through some 3/8" or 1/2" steel plate? They're probably not, is your answer. It is possible I got a bad batch. If thet make it right and I have an opportunity to try it out again and it holds up, I'll update this review. But as for now, I suggest you stay away from this cheap garbage ... show more
Reviewed in the United States on January 18, 2026 by William Rodenbaugh

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