Klein Tools Step Drill Bit, Qu...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$58.30
Klein Tools Step Drill Bit, Quick Release, Double Spiral Flute

Klein Tools Step Drill Bit, Quick Release, Double Spiral Flute

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Model: QRST11

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

$58.30
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Klein Tools Step Drill Bit with Quick Release Hex Shank, 7/8" to 1-3/8", AlTiN Coated Double Spiral Flute

Professional drilling performance with advanced coating technology

Klein Tools delivers professional-grade step drill bit performance with this quick-release design featuring a 1/4" hex shank and aluminum titanium nitride coating. This high-speed steel step drill bit handles 7/8" to 1-3/8" hole sizes with double spiral flute design for efficient chip removal. The impact-rated shaft works with both impact drivers and standard drills, while the AlTiN coating provides 10 times more durability than steamed black oxide coating for extended bit life.

Professional Features & Benefits

  • Quick-Release 1/4" Hex Shank: Provides firm, positive grip that won't spin out in the drill for reliable operation and easy bit changes.
  • Aluminum Titanium Nitride Coating: Delivers 10 times more durability than steamed black oxide coating for longer bit life and consistent performance.
  • Double Spiral Flute Design: Removes chips efficiently for faster cuts and drilling with reduced heat buildup.
  • Impact-Rated Shaft: Compatible with both impact drivers and standard drills for versatile application options.
  • Three Hole Size Capability: Drills 7/8" to 1-3/8" holes with laser markings for quick size identification.
  • Fast-Starting Non-Walking Tip: Ensures precise hole placement and reduces bit wandering for accurate drilling results.
  • High-Speed Steel Construction: Provides durability for use on steel up to 16 gauge, wood, plastic, and aluminum materials.

Technical Specifications

  • Coating: Aluminum Titanium Nitride (AlTiN)
  • Department: Electrical
  • Depth: 1.3800 in
  • Flute Type: Spiral
  • Height: 3.5700 in
  • Material: High Speed Steel
  • Number Of Holes: 3
  • Overall Height: 3.6" (9.4 cm)
  • Overall Length: 1.8" (4.6 cm)
  • Overall Width: 1.8" (4.6 cm)
  • Product Details: Step Drill Bit
  • Product Group: Hand Tools
  • Product Size: 7/8" to 1-3/8" (22.2 mm to 34.9 mm)
  • Product Subgroup: Screwdrivers & Drivers
  • Product Type: Step Drill Bit
  • Quick Reference: #15
  • Shank Type: 1/4" Hex
  • Weight: 0.4300 lbs
  • Width: 1.3800 in

Installation & Operation

  1. Mount the bit securely in a compatible drill or impact driver with 1/4" hex chuck capability.
  2. Mark the desired hole location and ensure proper workpiece support and clamping.
  3. Start drilling at low speed to establish the hole, then increase speed as needed for material type.
  4. Apply steady, moderate pressure while allowing the double spiral flutes to clear chips effectively.
  5. Use the laser markings to monitor hole size progress and stop at the desired diameter.
  6. Complete the hole with smooth, consistent feed rate and allow bit to cool between multiple holes.

Professional Applications

  • Electrical panel and enclosure installations requiring precise hole sizing
  • 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 for professional-grade performance. The impact-rated design and quick-release hex shank provide versatility across drilling applications, while the double spiral flute design ensures efficient operation and extended tool life for demanding professional use.

Manufacturer Resources

Spec Sheet

Product Specs

Product Group:
Power Tools & Accessories
Shank Type:
1/4" Hex
Product Subgroup:
Drill & Driver Bits
Department:
Electrical
Product Type:
Step Drill Bit
Coating:
Aluminum Titanium Nitride (AlTiN)
Product Details:
Step Drill Bit
Flute Type:
Spiral
Product Material:
High Speed Steel

Klein Tools QRST11 – Frequently Asked Questions

1) Will the Klein Tools QRST step drill bit work in an impact driver, or do I need a standard drill?
Either one. The QRST step bit uses a quick-release 1/4 inch hex shank and an impact-rated shaft, so it seats in an impact driver's collet or in a standard drill chuck. The quick-release collar is what keeps it from spinning out under impact.
2) Can I drill through a steel electrical enclosure with this step bit, and how thick can the steel be?
Yes, within limits. The high-speed steel QRST bit is rated for steel up to 16 gauge, plus wood, plastic and aluminum. That covers most panel and enclosure sheet metal and HVAC duct. Heavier plate or structural steel is past what this bit is rated for.
3) Do I need a center punch or pilot hole before using this step bit?
No pilot hole required. The tip is fast-starting and non-walking, so it bites where you set it. Start at low speed to establish the hole, then bring the speed up. Clamp or back up thin sheet so it doesn't grab and spin.
4) Which Klein step bit part number should I order, QRST11 or QRST15?
Both start at 7/8 inch. Order QRST11 if your largest hole is 1-1/8 inch, and QRST15 if you need up to 1-3/8 inch. QRST15 covers everything QRST11 does, so if you're stocking one bit on the truck it's the broader choice.
5) What does the AlTiN coating on this Klein step bit actually do for me?
The aluminum titanium nitride coating is a heat and wear barrier on the cutting edges. Klein states it gives 10 times the durability of a steamed black oxide bit, which matters when you're running a lot of holes in sheet steel back to back and heat is what kills the edge.
6) What is the difference between the double spiral flute on this Klein bit and a straight flute step bit?
The QRST uses a spiral flute, and the double spiral geometry pulls chips up and out of the hole instead of letting them pack in. Less packing means less heat and a faster cut, which is the main reason to choose a spiral flute step bit over a straight flute one for repeated holes in sheet metal.
How fast can I get the Klein Tools QRST11 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 QRST11 come with a warranty?
Absolutely. The Klein Tools QRST11 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 QRST11?
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 QRST11 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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