Klein Tools 13-Step Drill Bit ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$90.59
$67.43
Klein Tools KTSB01 13-Step Drill Bit, 3/8-Inch Hex, Double Straight Flute, 1/8-Inch to 1/2-Inch

Klein Tools 13-Step Drill Bit with AlTiN Coating, 3/8-Inch Hex Shank, 1/8-Inch to 1/2-Inch

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Model: KTSB01
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$90.59
$67.43
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Klein Tools 13-Step Drill Bit with AlTiN Coating

Professional precision drilling with advanced coating technology

The Klein Tools 13-Step Drill Bit delivers professional-grade performance with Aluminum Titanium Nitride coating that provides 10 times more durability than steamed black oxide coating. Featuring a robust 3/8-inch hex shank and double straight flute design, this high-speed steel bit handles steel up to 16 gauge, wood, plastic, and aluminum with precision and reliability.

Professional Features & Benefits

  • Aluminum Titanium Nitride Coating: Provides 10x longer bit life compared to standard coatings for extended tool performance and reduced replacement costs.
  • 13-Step Size Range (1/8" to 1/2"): Eliminates the need for multiple bits, increasing efficiency and reducing tool inventory requirements.
  • 3/8-Inch Hex Shank: Ensures positive grip and prevents spinning in drill chucks for consistent, reliable operation.
  • Double Straight Flute Design: Efficiently removes chips and debris for clean cuts and smooth drilling performance.
  • High Speed Steel Construction: Delivers durability and cutting performance across multiple material types including steel, aluminum, wood, and plastic.
  • Laser Markings: Provide clear size identification for quick selection and improved workflow efficiency.
  • Fast-Starting Non-Walking Tip: Ensures precise hole placement and reduces bit wandering for accurate drilling results.

Technical Specifications

  • Coating: Aluminum Titanium Nitride (AlTiN)
  • Department: Electrical
  • Depth: 4.7700 in
  • Flute Type: Straight
  • Height: 0.1800 in
  • Increment: 1/32" (0.8 mm)
  • Material: High Speed Steel
  • Number Of Holes: 13
  • Overall Height: 3.43" (8.7 cm)
  • Overall Length: 0.5" (1.3 cm)
  • Overall Width: 0.5" (1.3 cm)
  • Product Details: Step Drill Bit
  • Product Group: Hand Tools
  • Product Size: 1/8" to 1/2" (3.2 to 12.7 mm)
  • Product Subgroup: Screwdrivers & Drivers
  • Product Type: Step Drill Bit
  • Quick Reference: #1
  • Shank Type: 3/8" Hex
  • Weight: 0.0500 lbs
  • Width: 3.0600 in

Installation & Operation

  1. Mount the bit securely in a drill with compatible chuck size, ensuring the 3/8-inch hex shank is properly seated.
  2. Select appropriate drilling speed based on material type and thickness being drilled.
  3. Mark the desired hole location and position the fast-starting tip at the drilling point.
  4. Apply steady, controlled pressure while drilling, allowing the double straight flutes to clear chips effectively.
  5. Monitor drilling progress and step size selection using the laser markings for precise hole diameter.
  6. Complete the hole to desired step size and remove bit carefully, following proper safety procedures throughout operation.

Professional Applications

  • Electrical panel and enclosure installations requiring precise hole sizing
  • HVAC ductwork and sheet metal fabrication projects
  • Automotive repair and maintenance drilling applications
  • General construction and maintenance drilling tasks
  • Plumbing installations requiring multiple hole sizes
  • Industrial maintenance and repair operations
  • Professional contractor and tradesman applications

Why Choose Klein Tools Quality?

Klein Tools delivers professional-grade reliability with high-speed steel construction and advanced AlTiN coating technology. The precision laser markings and robust 3/8-inch hex shank design ensure consistent performance across demanding applications, making this step drill bit a trusted choice for electrical professionals and skilled tradesmen.

Manufacturer Resources

Spec Sheet

Product Specs

Coating:
Aluminum Titanium Nitride (AlTiN)
Flute Type:
Straight
Increment:
1/32" (0.8 mm)
Number Of Holes:
13
Overall Height:
3.43" (8.7 cm)
Overall Length:
0.5" (1.3 cm)
Overall Width:
0.5" (1.3 cm)
Quick Reference:
#1
Shank Type:
3/8" Hex
Department:
Electrical
Product Group:
Power Tools & Accessories
Product Subgroup:
Drill & Driver Bits
Product Type:
Step Drill Bit
Product Size:
1/8" to 1/2" (3.2 to 12.7 mm)
Product Details:
Step Drill Bit
Product Height:
0.1800 in
Product Material:
High Speed Steel
Product Weight:
0.0500 lbs
Product Width:
3.0600 in
Product Depth:
4.7700 in

Klein Tools KTSB01 – Frequently Asked Questions

1) What hole sizes will the Klein KTSB01 step bit drill, and in what increments?
The Klein Tools KTSB01 steps from 1/8 inch up to 1/2 inch (3.2 to 12.7 mm) across 13 cutting steps, with each step increasing by 1/32 inch (0.8 mm). That covers the small pilot and fastener holes most panel work needs, but it tops out at 1/2 inch, so knockouts for 1/2 inch conduit connectors and anything larger need a bigger step bit or a knockout punch.
2) Will a 3/8-inch hex shank step bit fit my impact driver or drill chuck?
The KTSB01 has a 3/8 inch hex shank, not a 1/4 inch hex quick-change shank. It seats in a 3/8 inch or 1/2 inch three-jaw chuck on a corded or cordless drill, where the flats keep it from spinning under load. It will not drop into a 1/4 inch hex impact driver collet.
3) How thick a steel can this Klein step bit drill?
Rated for steel up to 16 gauge. That covers most electrical enclosures, panel sides, junction boxes, strut, and HVAC sheet metal duct. Heavier plate is outside what this high speed steel bit is rated to cut, so use a twist bit or annular cutter there.
4) What does the AlTiN coating actually get me over a black oxide step bit?
Aluminum Titanium Nitride coating is claimed at 10 times the bit life of steamed black oxide. The practical difference is heat tolerance: the coating lets the edge survive the friction of stepping through sheet steel repeatedly, so a crew drilling panels all day gets more holes before the first steps dull out. Black oxide is fine for occasional wood and plastic.
5) Can I use this step bit on wood, plastic and aluminum, or is it steel only?
Besides 16 gauge steel, the KTSB01 cuts wood, plastic, and aluminum. The double straight flute clears chips in softer material instead of packing them, and the fast-starting tip keeps it from walking when you spot a hole on a smooth plastic enclosure face.
6) Is one Klein KTSB01 enough to replace a set of twist bits for panel work?
For holes between 1/8 and 1/2 inch in sheet material, yes, one bit covers the whole range in 1/32 inch steps, which is why electricians carry it instead of a full index. Two limits worth knowing: it is a sheet-material bit rated to 16 gauge steel, and the step geometry means it will not drill a straight-sided deep hole in thick stock the way a twist bit does.
7) How do I know which step I'm on while drilling?
Each step is laser marked with its size, so you read the diameter off the bit rather than counting rings. Drill to the mark that matches the hole you want and stop. Useful when you are running a mix of 3/8 and 1/2 inch holes in the same enclosure and do not want to oversize one.
8) What is the Klein model number and overall size of this step bit for ordering?
Order it as Klein Tools KTSB01. The bit measures 3.43 inches overall height and weighs 0.05 lbs, so it drops in a pouch without taking up space.
How fast can I get the Klein Tools KTSB01 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Klein Tools KTSB01 come with a warranty?
Absolutely. The Klein Tools KTSB01 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Klein Tools KTSB01?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Klein Tools KTSB01 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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