ProStaff Contractors Review Greenlee GSB Series Step Bits – Plumbing Perspective


When approached by Greenlee to test a new product late last year, we knew it was the perfect opportunity to work with a couple of our favorite electrical contractors, Adam Sperry and Jon Block.

Jon and Adam have been friends of The Hub for several years and bring a ton of electrical experience and knowledge to our sites. We connected them with Greenlee and after a few projects over a couple months, they share their experience with the Greenlee GSB Series Step Bits.

Jon Block reviews Greenlee GSB Series Step Bits

First off, the step bits are ideal for advanced hole making solution and feature an improved split-point tip for even faster penetration and a patented split-step design to optimize chip load for a faster and smooth cutting experience while achieving more holes per charge.

“These are perfect for making holes in conduit and steel junction boxes as well as enclosures for conduit knockouts or enlarging holes to accommodate larger conduit openings,” said Jon Block, LH Block Electric.

“There’s no reservations in using these bits, Greenlee has a long history in the trade of high-quality products. I’m sure Jon and I both look for a product that is priced appropriate to the results attained and Greenlee is a brand I trust and believe in due to their quality products,” Sperry shared.

Both agreed that the progressive cutting edges on the bits provided balanced aggression to maximize torque efficiency and minimize stalling when using a cordless drill.

Additionally, an improved double flute design provides enhanced chip evacuation, while also increasing cutting speed and bit life. Laser markings on the bits allow for easy part and size identification.

The GSB Series Step Bits for mild steel are offered in two sets, available in 10 Imperial-sized step bits ranging from 1/8-inch to 1-3/8-inch, and three Metric-sized step bits ranging from 4mm to 32.5mm.

Adam’s Final Assessment:

  • “These bits are the fastest, smoothest, most durable bits I have used and have performed beyond expectations even when subjected to less-than-ideal conditions.”
  • “Personally, I see step bits as a “consumable” item, which I feel is contrary to popular opinion. Most people feel as though the price associated with quality step bits somehow means they should last forever. I disagree. There are a lot of situations where the drilling is less than ideal, or the driller is less than adequately trained which can lead to more wear and tear on a bit. I also prefer the bits to NOT have the quick connect shaft or be impact rated.”

Jon’s Final Assessment:

  • ” I love the double flute design and the marked with common conduit knockout sizes and long-life durability.”
  • “The split step and the longer step for the common conduit hole sizes makes this a great tool for quick knockouts instead of grabbing a hydraulic knockout set. Greenlee tools are the best in the electrical contracting business.”
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Professionals interested in the GSB Step Bits can visit Greenlee.com/StepBits to learn more information. To request a hands-on tool demonstration from a Greenlee Pro Tool Specialist, visit Greenlee.com/requestdemonstration. For more information on Greenlee, visit Greenlee.com.

ProStaff Reviewers:

Adam got his start in the electrical industry 20+ years ago from his father who was an electrical distributor general manager. Adam has always been keen on working with his hands and takes an extreme satisfaction in watching a project come together from start to finish. One of the keys he brings to our ProStaff is his ability to share whatever tools, insights, tips, tricks, and lessons that have helped him in his career. You can find him on social media at:

Jon, after serving his apprenticeship and acquiring his Chicago Supervising Electrician License, Jon joined his family at LH Block Electric in 1998. Jon brings a unique and extreme work ethic and his many new innovative ideas to the company and currently serves as the job superintendent and chief estimator. He is also a certified electrical inspector and loves teaching the trade in the classroom and in the field. Jon can be found on Facebook at:





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