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THINKWORK 5 Pcs Four Spiral Flute Step Drill Bit Set & 5 Pcs Countersink Drill Bits with Tool Box, Nitriding HSS Drill Bits for Metal, Aluminum, Wood, Plastic

4.3 (8) Write Review
Free shipping on orders over $29.99

$38.99

$ 18 .99 $18.99

In Stock

About this item

  • ENHANCED DURABILITY: Our industrial-grade step drill set & countersink drill bit set is meticulously crafted from high-quality alloy steel and undergoes multiple manufacturing processes. Each drill bit is carefully inspected at the factory to ensure superior quality and longevity.
  • IMPROVED STABILITY: Unlike ordinary step drills that often suffer from deflection during cutting, our four-flute step drill bit provides exceptional stability. This feature enhances accuracy and cutting speed, making it perfect for stainless steel drilling. In fact, it offers a significantly longer service life compared to regular step drills.
  • NITRIDING BIT KIT: Our 10 Pcs nitriding step and countersink bits set includes a range of sizes to cater to various drilling needs. The set comprises step bits with diameters of /16"-1/2" (6 steps), 1/8"-1/2" (13 steps), 1/4"-3/4" (9 steps), 3/16"-7/8" (12 steps), and 3/16"-1-3/8" (19 steps). Countersink Drill Bits sizes1/4'', ”3/8'', 1/2'', 5/8'', 3/4''.
  • VERSATILE DRILLING CAPABILITY: With its powerful drilling capability, our step drill is suitable for piercing holes in various materials, including thin metal, copper, aluminum, iron, carbon steel, wood, and plastic. It's an essential addition to any DIY enthusiast's toolbox and can be utilized for a wide range of household projects.
  • USER-FRIENDLY DESIGN: Our step drill bits feature laser-engraved step sizes, ensuring clear visibility and eliminating concerns about wear and tear during use. This design element enhances convenience and accuracy, making the drilling process easier and more efficient.
  • DEDICATED CUSTOMER SERVICE: While our products undergo stringent quality inspections, unforeseen issues caused by accidental factors may occur. In such cases, we are committed to providing professional customer service. If you encounter any quality problems, please contact us via Amazon, and we will promptly replace the defective item with a new one.


Product Description

5Pcs Step Drill Bit Set & 5Pcs Countersink Drill Bit Set

Step Drill Bit Set and countersink drill bit
Step Drill Bit Set and countersink drill bit

Countersunk Drill Operation Steps

Step Drill Bit Set and countersink drill bit
Step Drill Bit Set and countersink drill bit
Step Drill Bit Set and countersink drill bit
Step Drill Bit Set and countersink drill bit

James R.
2025-09-04 18:29:08
The spiral grooves do a great job
Eric Mondello
2025-08-10 13:08:28
These are worth every penny, and at an affordable price. I'm a locksmith and do lots of install work, and these are a must have. Even my coworkers love them. Sharp, and cuts like nothing.
Gary grant
2025-08-06 10:04:36
Performed as advertised. I am very happy.
Lee Tuthill
2025-07-26 16:49:43
Great
PlaysCbricks
2025-07-24 15:53:45
drilled a hole in 3/8" thick mild steel angle iron with the middle size step bit without issue. used the second from largest chamfer bit and it left a bit of a rough chatter finish on the hole. not sure if it was because i was using a hand drill and not drill press. could have been me. no issues for me.
Willy
2025-06-18 16:19:24
Muy bien
Mad dog
2025-05-26 13:31:11
I'm a trim Carpenter and these work very good for my trade they are good quality and you can't go wrong with the price I love them
Shawn
2024-12-26 15:48:52
2nd pre drilled hole and one already broke
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