Greenlee Multi-Hole Step Bit S...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$310.61
Greenlee Multi-Hole Step Bit Set 3-Piece with Double Flute Design and Split-Point Tips

Greenlee Multi-Hole Step Bit Set 3-Piece with Double Flute Design and Split-Point Tips

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Model: GSBSET3
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$310.61
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Greenlee Multi-Hole Step Bit Set 3-Piece with Double Flute Design and Split-Point Tips

Professional drilling solution for versatile material cutting applications

The Greenlee Multi-Hole Step Bit Set delivers professional-grade performance with its improved double flute design and patented split-step technology. This 3-piece set includes GSB01, GSB04, and GSB09 bits with maximum drill diameters up to 1-1/8" and capability for 10 gauge sheet metal thickness. The durable split-point tips and three-flat shank design ensure compatibility with all 1/2" drill chucks while providing fast, accurate material penetration across mild steel, aluminum, brass, copper, wood, fiberglass, plastics and laminates.

Professional Features & Benefits

  • Double Flute Design: Superior chip evacuation increases cutting speeds and extends tool life for maximum productivity and cost efficiency.
  • Patented Split-Step Technology: Optimizes chip load for fast, smooth cutting while delivering more holes per battery charge in cordless applications.
  • Progressive Cutting Edges: Balanced aggression maximizes torque efficiency and minimizes motor stalling for consistent performance.
  • Split-Point Tips: Durable design provides fast, accurate material penetration with reduced walking and improved hole placement.
  • Three-Flat Shank: Universal compatibility with all 1/2" drill chucks ensures secure grip and prevents slipping during operation.
  • Laser Markings: Quick, easy product and size identification reduces setup time and improves workflow efficiency.
  • Versatile Material Compatibility: Cuts mild steel, aluminum, brass, copper, wood, fiberglass, plastics and laminates for diverse applications.

Technical Specifications

  • Country Of Origin: United States
  • Included: GSB01 (1/2" bit) , GSB04 (7/8" bit), GSB09 (1-1/8" bit) and carrying case
  • Maximum Drill Diameter: GSB01 - 1/2" (12.7 mm), GSB04 - 7/8" (22.2 mm), GSB09 - 1-1/8" (28.6 mm)
  • Maximum Sheet Metal Thickness: 10 gauge (3.5 mm)
  • Minimum Drill Diameter: GSB01 - 1/8" (3.2 mm), GSB04 - 3/16" (4.8 mm), GSB09 - 3/16" (4.8 mm)
  • Product Type: Multi-hole Step Bit Set

Installation & Operation

  1. Mount the step bit securely in a compatible 1/2" drill chuck using the three-flat shank design for optimal grip.
  2. Select the appropriate bit size based on the required hole diameter range and material thickness specifications.
  3. Mark the drilling location and position the split-point tip for accurate material penetration without walking.
  4. Begin drilling at moderate speed, allowing the progressive cutting edges to engage gradually for smooth operation.
  5. Maintain steady pressure and let the double flute design evacuate chips naturally for optimal cutting performance.
  6. Complete the hole to the desired diameter using the laser markings for quick size identification and verification.

Professional Applications

  • Electrical installations requiring precise holes in metal panels and enclosures
  • HVAC ductwork fabrication and modification projects
  • Plumbing installations through metal studs and structural components
  • General construction and maintenance drilling in mixed materials
  • Industrial fabrication requiring clean, accurate holes in sheet metal
  • Automotive and equipment repair applications
  • Professional contractor and maintenance operations

Why Choose Greenlee Quality?

Greenlee delivers professional-grade tools manufactured in the United States with patented split-step design technology and laser marking systems. The included carrying case ensures organized storage and transport, while the durable construction and progressive cutting edge design provide reliable performance across diverse material applications for long-term value and productivity.

Manufacturer Resources

Product Specs

Country Of Origin:
United States
Maximum Sheet Metal Thickness:
10 gauge (3.5 mm)
Product Type:
Drill Bit Set
Department:
Electrical
Product Subgroup:
Drill & Driver Bits
Product Group:
Power Tools & Accessories

Greenlee GSBSET3 – Frequently Asked Questions

1) What hole sizes can I drill with the Greenlee GSBSET3 3-piece step bit set?
The GSBSET3 covers 1/8 inch up to 1-1/8 inch across three bits. GSB01 steps from 1/8 inch (3.2 mm) to 1/2 inch (12.7 mm), GSB04 runs 3/16 inch (4.8 mm) to 7/8 inch (22.2 mm), and GSB09 runs 3/16 inch (4.8 mm) to 1-1/8 inch (28.6 mm). That spans the common knockout and conduit connector sizes an electrician drills in panels and enclosures, and a carrying case is included.
2) How thick a sheet metal can a Greenlee GSBSET3 step bit cut through?
Up to 10 gauge, about 3.5 mm. That handles panel boxes, enclosures, troughs, duct and most strut and light structural sheet. For anything heavier than 10 gauge, step bits are the wrong tool and you want a hole cutter or a knockout punch instead.
3) Should I use a step bit set or a knockout punch for conduit holes in an enclosure?
Step bits like the GSBSET3 make sense when you need variable hole sizes, access from one side only, or holes in material up to 10 gauge, and when you are drilling mixed materials on the same job. A knockout punch is the better choice for repeated large trade sizes in heavier gauge or where you need a perfectly round, burr-free hole fast. Many crews carry both: the bit set for small and odd sizes up to 1-1/8 inch, the punch for 1/2 inch trade size and larger production work.
4) Can these Greenlee step bits drill anything besides steel?
Yes. The set cuts mild steel, aluminum, brass, copper, wood, fiberglass, plastics and laminates. That makes it practical for mixed-material maintenance work, running holes through a metal stud on one task and a plastic enclosure or plywood backboard on the next, without swapping tooling.
5) What does the double flute and split-step design actually change on the job?
Two flutes clear chips faster than a single flute, which lets the bit cut quicker and run cooler, and the patented split-step geometry limits how much material each step takes at once. On cordless drills that shows up as more holes per battery charge and less motor stalling, because the progressive cutting edges keep torque demand even instead of spiking as the bit steps up.
6) Do I need a center punch or pilot hole before using these step bits?
Not usually. Each bit has a split-point tip that bites in on contact and resists walking, so you can mark the location and start drilling. Center punching still helps on slick or curved sheet, but for flat panel work the split point places the hole well on its own. Start at moderate speed and let the steps engage rather than forcing it.
7) How do I tell which Greenlee step bit I am holding once they are out of the case?
The bits carry laser markings for product and size identification, so each step is readable on the tool itself. The three in the set are GSB01 (to 1/2 inch), GSB04 (to 7/8 inch) and GSB09 (to 1-1/8 inch), and they are ordered as the GSBSET3 kit. Individual bits can be replaced by those part numbers if you wear one out.
8) Is the Greenlee GSBSET3 step bit set made in the USA for a buy-American job spec?
Country of origin on the GSBSET3 step bit set is the United States. If your project carries a domestic-sourcing requirement on tooling, that is the stated origin for this kit.
How fast can I get the Greenlee GSBSET3 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 Greenlee GSBSET3 come with a warranty?
Absolutely. The Greenlee GSBSET3 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 Greenlee GSBSET3?
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 Greenlee GSBSET3 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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