Klein Tools Step Drill Bit Set...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$354.15
Klein Tools Premium Electrician's Quick Release Step Bit Set, 3 Piece

Klein Tools Step Drill Bit Set 3-Piece Quick Release 1/4-Inch Hex Shank AlTiN Coated Multi-Material

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

$354.15
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Klein Tools Premium Electrician's Quick Release Step Bit Set

Professional-Grade 3-Piece Step Drill Bit Set with AlTiN Coating

The Klein Tools Premium Electrician's Quick Release Step Bit Set delivers professional-grade drilling performance for multi-material applications. This high-speed steel 3-piece set features aluminum titanium nitride coating and quick-release hex shanks designed for electricians, contractors, and electrical 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 (AlTiN) Coating - 10 times more durable than steamed black oxide coating for extended bit life and superior performance
  • Double Spiral Flute Design - Removes chips efficiently for faster cuts and smoother drilling operation
  • Fast-Starting Non-Walking Drill Tip - Provides precise hole placement and reduces bit wandering on material surfaces
  • Laser Markings - Easy-to-read size identification for quick selection and professional efficiency

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 applications
  • Quick-Release 1/4-Inch Hex Shank - Provides firm, positive grip that won't spin out during drilling operations

Modular Storage System

  • Compact Modular Case - Designed to nest within MODbox toolboxes and Case Adapter Side Rail Attachments for organized storage
  • Cutting Oil Included - Professional-grade cutting oil extends bit life and improves cutting performance

Technical Specifications

Three-piece set with size ranges: 3/16" to 7/8" (4.8 to 22.2 mm), 7/8" to 1-1/8" (22.2 to 28.6 mm), and 7/8" to 1-3/8" (22.2 to 34.9 mm). Features 12, 2, and 3 holes respectively. High-speed steel construction with aluminum titanium nitride coating. 1/4-inch hex shank design. Case dimensions: 3.72" W x 9.25" D x 1.8" H. Total weight: 1.28 lbs. Spiral flute design for efficient chip removal.

Installation & Usage

  1. Select appropriate step bit size for desired hole diameter and material thickness
  2. Apply cutting oil to bit surface for optimal performance and extended life
  3. Insert quick-release hex shank firmly into drill chuck or impact driver
  4. Position fast-starting tip at marked drilling location to prevent walking
  5. Begin drilling at moderate speed, allowing double spiral flutes to clear material chips
  6. Step up through sizes gradually for larger holes, maintaining steady pressure and speed

Professional Applications

Ideal for:

  • Electrical Installation - Drilling holes in electrical panels, junction boxes, and conduit fittings
  • Steel Fabrication - Creating precise holes in steel up to 16 gauge thickness
  • HVAC Applications - Drilling ductwork and sheet metal components
  • Telecommunications Work - Installing cable entry points and mounting hardware
  • Industrial Maintenance - Repair and modification work on metal enclosures and equipment
  • Construction Projects - Multi-material drilling in wood, plastic, and aluminum components
  • Automotive Electrical - Creating wiring passages and mounting holes
  • Commercial Electrical - Panel modifications and conduit installations

AlTiN Coating Advantage

Klein Tools' aluminum titanium nitride coating technology provides superior hardness and heat resistance compared to standard coatings. This advanced surface treatment reduces friction, prevents material buildup, and maintains sharp cutting edges longer. The coating's gold color also provides easy visual identification and professional appearance that reflects Klein's commitment to quality craftsmanship.

Why Choose Klein Tools Quality?

Since 1857, Klein Tools has been America's premier manufacturer of professional-grade tools for electricians and tradesmen. Each step bit undergoes rigorous testing to ensure it meets Klein's exacting standards for durability, precision, and safety. The modular case system reflects Klein's innovation in tool organization, while the premium AlTiN coating demonstrates the company's commitment to advancing tool technology for professional applications.



KLN-QRSTSPRO - spec sheet

Manufacturer Resources

Spec Sheet

Product Specs

Application:
Multi-Material Drilling
Coating:
Aluminum Titanium Nitride (AlTiN)
Flute Type:
Spiral
Increment:
Varies
Number Of Holes:
12, 2, and 3
Overall Height:
3.2" to 3.6" (8.1 to 9.4 cm)
Overall Length:
0.88" to 1.8" (2.2 to 4.6 cm)
Overall Width:
0.88" to 1.8" (2.2 to 4.6 cm)
Quick Reference:
#14, #11, #15
Shank Type:
1/4" Hex
Product Type:
Drill Bit Set
Department:
Electrical
Product Group:
Power Tools & Accessories
Product Subgroup:
Drill & Driver Bits
Product Details:
Step Drill Bit
Product Height:
1.8000 in
Product Material:
High Speed Steel
Product Weight:
1.2800 lbs
Product Width:
3.7200 in
Product Depth:
9.2500 in

Klein Tools QRSTSPRO – Frequently Asked Questions

1) What hole sizes does the Klein QRSTSPRO 3-piece step bit set cover?
The three bits in the Klein QRSTSPRO set cover 3/16 inch to 7/8 inch (4.8 to 22.2 mm), 7/8 inch to 1-1/8 inch (22.2 to 28.6 mm), and 7/8 inch to 1-3/8 inch (22.2 to 34.9 mm). Step counts are 12, 2, and 3 respectively, so the small bit gives you fine increments for device and panel knockouts while the two larger bits jump straight to the big conduit sizes.
2) Can I run these Klein step bits in an impact driver, or do I need a drill?
Either one. The shank is impact rated and it's a quick-release 1/4 inch hex, so it seats in an impact driver's collet or in a standard drill chuck without spinning out.
3) How thick a steel panel will these step bits cut?
Klein rates the set for steel up to 16 gauge. That covers most electrical enclosures, panel sides, junction boxes and sheet metal ductwork. For heavier plate you want a different cutter, since a step bit's steps are only as deep as the material it's designed to shoulder against.
4) What materials besides steel can these bits drill?
The set is built for multi-material work: sheet steel, aluminum, plastic and wood. High speed steel body with an aluminum titanium nitride coating, which cuts friction and heat so the edges stay sharp in metal. Klein calls the AlTiN coating 10 times more durable than steamed black oxide.
5) Does anything come with the Klein QRSTSPRO set besides the three bits?
Cutting oil is included, along with a compact modular case. The case is built to nest inside Klein MODbox toolboxes and Case Adapter Side Rail Attachments, so it drops into an existing MODbox setup rather than riding loose in the van.
6) Which individual Klein step bit numbers are in this 3-piece set?
The set bundles Klein step bits #14, #11 and #15. Useful if you already run one of those loose and want to know what you're duplicating, or need to reorder a single replacement instead of the whole kit. The set itself is part number QRSTSPRO.
7) Will a step bit walk when I start a hole in a panel face?
These use a fast-starting non-walking tip, so they bite at the mark instead of skating across the enclosure face. Double spiral flutes clear the chips as the step advances, and each step is laser marked so you can read the size while the bit is in the tool. Apply the included cutting oil before you start and keep the speed moderate.
8) How big is the case and how much does the whole kit weigh?
Case runs 3.72 inches wide by 9.25 inches deep by 1.8 inches high, and the kit weighs 1.28 lbs complete. Flat enough to lay in a pouch or a drawer rather than eating bucket space.
How fast can I get the Klein Tools QRSTSPRO 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 QRSTSPRO come with a warranty?
Absolutely. The Klein Tools QRSTSPRO 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 QRSTSPRO?
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 QRSTSPRO from ZenSupply?
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