Klein Tools Step Drill Bit Kit...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$210.70
$119.03
Klein Tools QRST3PC Premium All Purpose Quick Release Step Bit Kit, 3 Piece

Klein Tools Step Drill Bit Kit 3-Piece Quick Release 1/4-Inch Hex Shank High Speed Steel Premium All Purpose

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Model: QRST3PC
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$210.70
$119.03
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Klein Tools Step Drill Bit Kit 3-Piece Quick Release Premium All Purpose

Professional-Grade Step Drill Bit Set with Aluminum Titanium Nitride Coating

The Klein Tools Step Drill Bit Kit 3-Piece Quick Release delivers professional-grade drilling performance for electrical, construction, and industrial applications. This high speed steel step bit set features aluminum titanium nitride coating and dual spiral fluting designed for electricians, contractors, and maintenance professionals, providing the reliable performance and industry-leading quality that tradesmen demand from America's most trusted tool manufacturer.

Professional Features & Benefits

Advanced Coating Technology

  • Aluminum Titanium Nitride Coating - 10 times more durable than steamed black oxide coating for extended bit life and superior performance
  • Dual Spiral Fluting - Removes chips efficiently for faster cuts and smoother drilling operation
  • Laser Markings - Easy-to-read size identification for quick selection and professional efficiency
  • Fast-Starting Non-Walking Drill Tip - Precise hole placement and reduced bit wandering for accurate drilling

Professional Construction & Durability

  • High Speed Steel Construction - Premium material provides exceptional durability and cutting performance across multiple materials
  • Impact Rated Shaft - Compatible with both impact drivers and standard drills for versatile professional use
  • Quick-Release 1/4-Inch Hex Shank - Firm, positive grip prevents spinning out in drill chuck for reliable operation

Modular Storage System

  • Compact Modular Case - Includes cutting oil and nests neatly within MODbox toolboxes and Case Adapter Side Rail Attachment
  • Professional Organization - Keeps bits secure and organized for efficient job site management and tool accountability

Technical Specifications

Three-piece step drill bit set with size ranges: 1/8" to 1/2" (3.2 to 12.7 mm), 1/4" to 3/4" (6.4 to 19.1 mm), and 3/16" to 7/8" (4.8 to 22.2 mm). High speed steel construction with aluminum titanium nitride coating. 1/4-inch hex shank design. Dual spiral flute configuration. Includes 13, 9, and 12 hole drilling capabilities. Case dimensions: 3.7" width x 1.8" height x 9.25" depth. Total weight: 0.8 lbs. Includes cutting oil for optimal performance.

Installation & Usage

  1. Select appropriate step bit size for desired hole diameter range and material thickness
  2. Apply included cutting oil to bit for optimal cutting performance and extended tool life
  3. Secure 1/4-inch hex shank firmly in drill chuck or impact driver for positive grip
  4. Position fast-starting tip at desired hole location and begin drilling at moderate speed
  5. Allow dual spiral flutes to clear chips naturally while maintaining steady drilling pressure
  6. Monitor laser markings to achieve precise hole diameter for professional installation requirements

Professional Applications

Ideal for:

  • Electrical Installation - Drilling holes in electrical panels, junction boxes, and conduit fittings for wire management
  • Construction Work - Creating precise holes in steel framing, aluminum siding, and plastic materials up to 16 gauge
  • HVAC Applications - Drilling ductwork, equipment mounting holes, and ventilation system installations
  • Industrial Maintenance - Equipment repair, machinery modification, and facility maintenance drilling tasks
  • Telecommunications - Cable entry holes, equipment mounting, and infrastructure installation projects
  • Automotive Work - Body panel drilling, bracket installation, and custom fabrication projects
  • Plumbing Applications - Pipe support drilling, fixture mounting, and system modification work
  • General Contracting - Multi-material drilling for wood, plastic, aluminum, and steel applications

Aluminum Titanium Nitride Advantage

Klein Tools' advanced aluminum titanium nitride coating technology provides superior wear resistance and heat dissipation compared to standard coatings. This professional-grade surface treatment extends bit life significantly while maintaining sharp cutting edges for consistent hole quality. The coating reduces friction and heat buildup during drilling, enabling faster cutting speeds and improved productivity for electrical and construction professionals.

Why Choose Klein Tools Quality?

Since 1857, Klein Tools has maintained America's highest standards for electrical tool manufacturing, combining traditional craftsmanship with innovative engineering. Each step drill bit undergoes rigorous testing protocols to ensure professional-grade performance and safety compliance. Klein Tools' commitment to quality means electricians, contractors, and maintenance professionals can rely on consistent performance, extended tool life, and the precision required for critical electrical and construction applications.



KLN-QRST3PC - spec sheet

Manufacturer Resources

Spec Sheet

Product Specs

Coating:
Aluminum Titanium Nitride (AlTiN)
Flute Type:
Spiral
Increment:
1/32" (0.8 mm); 1/16" (1.6 mm); 1/16" (1.6 mm)
Number Of Holes:
13, 9, and 12
Overall Height:
2.8" to 3.4" (7.1 to 8.6 cm)
Overall Length:
0.5" to 0.88" (1.3 to 2.2 cm)
Overall Width:
0.5" to 0.88" (1.3 to 2.2 cm)
Quick Reference:
#1, #3, #14
Shank Type:
1/4" Hex
Department:
Electrical
Product Group:
Power Tools & Accessories
Product Subgroup:
Drill & Driver Bits
Product Type:
Drill Bit Set
Product Details:
Step Drill Bit
Product Height:
1.8000 in
Product Material:
High Speed Steel
Product Weight:
0.8000 lbs
Product Width:
3.7000 in
Product Depth:
9.2500 in

Klein Tools QRST3PC – Frequently Asked Questions

1) What hole sizes do the three bits in the Klein QRST3PC step bit kit cover?
The three bits in the Klein Tools QRST3PC kit span 1/8 to 1/2 inch (3.2 to 12.7 mm), 1/4 to 3/4 inch (6.4 to 19.1 mm), and 3/16 to 7/8 inch (4.8 to 22.2 mm). Step counts are 13, 9, and 12 holes respectively, so between them you can hit most common conduit knockout and device-mounting diameters without swapping to hole saws.
2) Can I run these Klein step bits in an impact driver, or do I need a drill?
Either works. The shaft is impact rated and the shank is a quick-release 1/4 inch hex, so it drops straight into an impact driver collet or chucks up in a standard drill without spinning out.
3) What material thickness will these step bits handle?
Step bits cut sheet material, not thick stock. Klein rates this kit for sheet metal, aluminum siding and plastics up to 16 gauge, which covers panel enclosures, junction boxes, duct and stud track. For anything heavier than sheet, use a different bit type.
4) What size increments do the steps go up in on this Klein 3-piece step bit set?
The small bit steps in 1/32 inch (0.8 mm) increments; the other two step in 1/16 inch (1.6 mm). The finer 1/32 inch steps on the 1/8 to 1/2 inch bit are what you want for close-tolerance holes in thin panel; the 1/16 inch bits get you to larger diameters in fewer steps. Each step is laser marked so you can read the size while you drill.
5) Is the AlTiN coating on these bits actually different from a black oxide step bit?
Yes, and it matters for bit life. The aluminum titanium nitride (AlTiN) coating is rated 10 times more durable than steamed black oxide, and it sheds heat better, so the cutting edges stay sharp through more holes at higher speed. Base material is high speed steel.
6) Does the Klein QRST3PC kit come with anything besides the three bits?
Cutting oil is included, along with a compact modular case that holds the bits. The case nests inside Klein MODbox toolboxes and works with the Case Adapter Side Rail Attachment, so it rides in an existing modular setup rather than loose in a bag.
7) Which individual Klein step bits are in the QRST3PC kit if I need to replace just one?
The kit contains Klein step bit sizes #1, #3 and #14. If you wear out one bit, that reference tells you which single size to reorder instead of buying the whole 3-piece kit again.
8) How big is the case and how much does the Klein step bit kit weigh in the bag?
The case measures 3.7 inches wide by 1.8 inches high by 9.25 inches deep and the whole kit weighs 0.8 lbs. Flat and light enough to live in a pouch or tool bag side pocket.
9) Why does a step bit wander less than a twist bit on sheet metal?
Two things on these Klein bits do it. The tip is a fast-starting non-walking design, so it bites where you set it instead of skating across the panel, and dual spiral flutes pull chips clear so the bit keeps cutting rather than riding on swarf. On a live panel install that is the difference between a clean hole and a scarred enclosure face.
How fast can I get the Klein Tools QRST3PC 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 QRST3PC come with a warranty?
Absolutely. The Klein Tools QRST3PC 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 QRST3PC?
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 QRST3PC 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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