Klein Tools 2-Step Drill Bit 7...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$120.20
$64.36
Klein Tools KTSB11 2-Step Drill Bit, 3/8-Inch Hex, Double Straight Flute, 7/8-Inch to 1-1/8-Inch

Klein Tools 2-Step Drill Bit 7/8-Inch to 1-1/8-Inch with 3/8-Inch Hex Shank and AlTiN Coating

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Model: KTSB11
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$120.20
$64.36
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Klein Tools 2-Step Drill Bit 7/8-Inch to 1-1/8-Inch with 3/8-Inch Hex Shank and AlTiN Coating

Professional drilling performance with aluminum titanium nitride coating for extended durability

Klein Tools delivers professional-grade drilling performance with this 2-step drill bit featuring 7/8-inch to 1-1/8-inch sizing and durable 3/8-inch hex shank construction. Built from high speed steel with aluminum titanium nitride coating, this step drill bit provides reliable performance for steel up to 16 gauge, wood, plastic, and aluminum applications with double straight flute design for clean chip removal.

Professional Features & Benefits

  • 7/8-Inch to 1-1/8-Inch Step Sizing: Provides two precise hole sizes in one bit for versatile drilling applications and reduced tool changes.
  • Aluminum Titanium Nitride Coating: Delivers 10 times more durability than steamed black oxide coating for extended bit life and consistent performance.
  • 3/8-Inch Hex Shank: Ensures firm, positive grip in drill chucks and prevents spinning out during operation for reliable power transfer.
  • Double Straight Flute Design: Removes chips efficiently for clean cuts and smooth drilling action across multiple materials.
  • High Speed Steel Construction: Provides the strength and heat resistance needed for demanding drilling applications in various materials.
  • Fast-Starting Non-Walking Tip: Eliminates bit wandering for precise hole placement and professional results from the first contact.
  • Laser Markings: Enable quick size identification for efficient workflow and proper bit selection in professional environments.

Technical Specifications

  • Coating: Aluminum Titanium Nitride (AlTiN)
  • Department: Electrical
  • Depth: 3.2200 in
  • Flute Type: Straight
  • Height: 1.2000 in
  • Increment: Varies
  • Material: High Speed Steel
  • Number Of Holes: 2
  • Overall Height: 3.22" (8.2 cm)
  • Overall Length: 1.13" (2.9 cm)
  • Overall Width: 1.13" (2.9 cm)
  • Product Details: Step Drill Bit
  • Product Group: Hand Tools
  • Product Size: 7/8" to 1-1/8" (22.2 to 28.6 mm)
  • Product Subgroup: Screwdrivers & Drivers
  • Product Type: Step Drill Bit
  • Quick Reference: #11
  • Shank Type: 3/8" Hex
  • Weight: 0.3000 lbs
  • Width: 1.2000 in

Installation & Operation

  1. Mount the bit securely in a compatible drill with 3/8-inch hex chuck or appropriate chuck adapter.
  2. Mark the desired hole location and ensure workpiece is properly secured and supported.
  3. Start drilling at low speed to establish the hole, then increase to appropriate speed for the material being drilled.
  4. Apply steady, consistent pressure while allowing the double straight flutes to clear chips effectively.
  5. Monitor drilling progress and step sizing to achieve the desired hole diameter for your application.
  6. Complete final inspection and follow proper bit maintenance practices for extended service life.

Professional Applications

  • Electrical panel and enclosure installations requiring precise knockout holes
  • HVAC ductwork and sheet metal fabrication projects
  • Automotive and mechanical repair applications
  • General construction and maintenance drilling tasks
  • Plastic and aluminum component modifications
  • Wood working projects requiring stepped hole profiles

Why Choose Klein Tools Quality?

Klein Tools step drill bits combine high speed steel construction with advanced aluminum titanium nitride coating technology to deliver professional-grade performance and extended service life. The precision-engineered double straight flute design and non-walking tip ensure clean, accurate holes across multiple materials, while the durable 3/8-inch hex shank provides reliable power transfer and secure chuck engagement for demanding professional applications.

Manufacturer Resources

Spec Sheet

Product Specs

Coating:
Aluminum Titanium Nitride (AlTiN)
Flute Type:
Straight
Increment:
Varies
Number Of Holes:
2
Overall Height:
3.22" (8.2 cm)
Overall Length:
1.13" (2.9 cm)
Overall Width:
1.13" (2.9 cm)
Quick Reference:
#11
Shank Type:
3/8" Hex
Department:
Electrical
Product Group:
Power Tools & Accessories
Product Subgroup:
Drill & Driver Bits
Product Type:
Step Drill Bit
Product Size:
7/8" to 1-1/8" (22.2 to 28.6 mm)
Product Details:
Step Drill Bit
Product Height:
1.2000 in
Product Material:
High Speed Steel
Product Weight:
0.3000 lbs
Product Width:
1.2000 in
Product Depth:
3.2200 in

Klein Tools KTSB11 – Frequently Asked Questions

1) Will a 3/8-inch hex shank step bit fit my drill?
The KTSB11 has a 3/8 inch hex shank, so it seats in any 3/8 inch or larger keyed or keyless chuck, and the hex flats keep it from spinning out under torque. It will not drop straight into a 1/4 inch quick-change impact holder without an adapter chuck.
2) How thick a steel panel can this Klein step bit drill?
Rated for steel up to 16 gauge, plus wood, plastic and aluminum. That covers typical electrical enclosures, panel sides and light sheet metal. For heavier plate or structural steel you want a different cutter, not a step bit.
3) What is the difference between the AlTiN coating on this Klein bit and a plain black oxide step bit?
The aluminum titanium nitride (AlTiN) coating on the KTSB11 is stated to give 10 times the durability of steamed black oxide. The base is high speed steel either way; the coating is what handles the heat when you are cutting metal repeatedly. If you only drill occasionally in wood or plastic, the coating matters less.
4) Do I need a center punch before drilling with this step bit?
No. The KTSB11 has a fast-starting, non-walking tip, so it bites where you put it without wandering across sheet metal. Start slow to establish the hole, then bring the speed up for the material.
5) Does a double straight flute step bit clear chips better than a single flute?
The KTSB11 uses a double straight flute, which gives two cutting edges and two chip paths per revolution. In sheet steel and aluminum that means less chip packing and a cleaner hole edge, at the cost of needing steady, even feed pressure rather than forcing it.
6) How long is the Klein KTSB11 step bit and how much does it weigh?
Overall height is 3.22 inches (8.2 cm) with a 1.13 inch (2.9 cm) body width, and it weighs 0.3 lbs. Short enough for a pouch and light enough that it does not unbalance a compact drill working inside an enclosure.
7) How do I tell which Klein step bit I'm grabbing out of the pouch?
The KTSB11 carries laser size markings on the steps and is Klein's quick reference #11, so you can read the size off the bit itself instead of measuring. Handy when several step bits are running on the same job.
How fast can I get the Klein Tools KTSB11 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 KTSB11 come with a warranty?
Absolutely. The Klein Tools KTSB11 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 KTSB11?
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 KTSB11 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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