Greenlee 1-1/8" Multi-Hole Ste...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$99.64
Greenlee 1-1/8" Multi-Hole Step Bit (#9) Metal Cutter with Split-Point Tip

Greenlee 1-1/8" Multi-Hole Step Bit (#9) Metal Cutter with Split-Point Tip

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Model: GSB09

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

$99.64
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Greenlee 1-1/8" Multi-Hole Step Bit (#9) Metal Cutter with Split-Point Tip

Professional multi-stage drilling for versatile material applications

The Greenlee 1-1/8" Multi-Hole Step Bit (#9) Metal Cutter delivers professional-grade performance for cutting mild steel, aluminum, brass, copper, wood, fiberglass, plastics and laminates. Featuring a patented split-step design and durable split-point tip, this 4-stage step bit provides fast, accurate material penetration with superior chip evacuation for extended tool life and optimal cutting performance.

Professional Features & Benefits

  • 1-1/8" Maximum Capacity: Handles drilling tasks from 3/16" to 1-1/8" diameter in a single tool, reducing bit changes and improving workflow efficiency.
  • 4-Stage Progressive Design: Multiple drill stages provide versatile hole sizing options while the progressive cutting edges maximize torque efficiency and minimize motor stalling.
  • 10 Gauge Sheet Metal Rating: Cuts through sheet metal up to 10 gauge (3.5 mm) thickness, making it suitable for electrical, HVAC, and general metalworking applications.
  • Split-Point Tip Technology: Durable split-point tip ensures fast, accurate material penetration and reduces walking on smooth surfaces for precise hole placement.
  • Improved Double Flute Design: Superior chip evacuation design increases cutting speeds, extends tool life, and delivers more holes per battery charge in cordless applications.
  • Three-Flat Shank: Compatible with all 1/2" drill chucks for secure grip and reduced slippage during high-torque operations.
  • Laser Markings: Quick, easy product and size identification for efficient job site use and inventory management.

Technical Specifications

  • Country Of Origin: United States
  • Maximum Drill Diameter: 1/8" (3.2 mm)
  • Maximum Sheet Metal Thickness: 10 gauge (3.5 mm)
  • Minimum Drill Diameter: 3/16" (4.8 mm)
  • Number Of Drill Stages: 4
  • Product Height: 1 IN
  • Product Type: Multi-hole Step Bit
  • Product Weight: 0.32 LB
  • Product Width: 4 IN

Installation & Operation

  1. Mount the step bit securely in a 1/2" drill chuck using the three-flat shank design for optimal grip.
  2. Mark the desired hole location and center punch if working on smooth metal surfaces.
  3. Start drilling at low speed to establish the hole, then increase speed as the split-point tip engages the material.
  4. Apply steady, moderate pressure and allow the progressive cutting edges to advance through each stage.
  5. Clear chips regularly during operation to maintain optimal cutting performance and tool life.
  6. Complete drilling to the desired diameter stage and withdraw the bit while the drill is still running.

Professional Applications

  • Electrical panel and enclosure modifications
  • HVAC ductwork and equipment installation
  • Metal fabrication and sheet metal work
  • Automotive and equipment repair
  • General construction and maintenance
  • Plumbing and mechanical installations

Why Choose Greenlee Quality?

Greenlee step bits are manufactured in the United States with patented split-step design technology that optimizes chip load for fast, smooth cutting performance. The durable construction and improved double flute design deliver superior tool life and cutting efficiency, making this step bit a reliable choice for professional tradespeople and contractors who demand consistent results.

Manufacturer Resources

Product Specs

Product Type:
Step Drill Bit
Country Of Origin:
United States
Department:
Electrical
Maximum Sheet Metal Thickness:
10 gauge (3.5 mm)
Minimum Drill Diameter:
3/16" (4.8 mm)
Maximum Drill Diameter:
1/8" (3.2 mm)
Number Of Drill Stages:
4
Product Subgroup:
Hole Saws & Bits
Product Group:
Power Tools & Accessories

Greenlee GSB09 – Frequently Asked Questions

1) What hole sizes can I drill with the Greenlee GSB09 step bit?
The GSB09 is a 4-stage step bit starting at a 3/16 inch minimum drill diameter, with 1-1/8 inch as the largest step. Four stages in one tool means fewer chuck changes when you are punching a run of different knockout sizes in the same panel.
2) How thick a piece of sheet metal will a Greenlee GSB step bit cut?
Up to 10 gauge, which is 3.5 mm. That covers enclosure walls, ductwork and most strut and panel sheet stock. Heavier plate is past the bit's rating, and forcing it will cost you the cutting edges.
3) Can I use a Greenlee step bit on plastic and fiberglass enclosures, not just steel?
Yes. The cutter is rated for mild steel, aluminum, brass and copper as well as wood, fiberglass, plastics and laminates, so the same bit handles a PVC or fiberglass junction box and a steel panel on the same job.
4) Does a step bit wander when starting a hole on smooth painted steel?
The split-point tip is there to bite instead of skate, which cuts down on walking on smooth surfaces. Best practice on sheet steel is still a center punch mark, then start at low speed until the tip engages and bring the speed up from there.
5) Are Greenlee GSB step bits made in the USA?
Yes, the GSB multi-hole step bits are manufactured in the United States. That matters if you are buying against a domestic-preference or Buy American purchasing policy on a public job.
6) Why do the flutes matter on a step bit for cordless drilling?
Chip evacuation is what keeps a step bit cutting instead of packing up. The double flute design clears chips to hold cutting speed, which translates to more holes per battery charge on a cordless drill. Clear chips off the work as you go through each stage.
How fast can I get the Greenlee GSB09 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 GSB09 come with a warranty?
Absolutely. The Greenlee GSB09 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 GSB09?
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 GSB09 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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