Hole Cutter Arbor 2-3/8 in to 3 in Quick Change - Durable Pilot Drill

In this review the Greenlee 645-022 hole cutter arbor is examined for tradespeople who need a reliable fast way to swap hole cutter heads. The bottom line: it is most useful for metalworkers and electricians who cut holes from 2-3/8 in to 3 in because the quick change arbor and replaceable, cobalt-steel pilot drill make head changes and centering straightforward. The review focuses on build, cutting performance in stainless steel, and practical limits so buyers can decide if it fits their tool kit.

Key Features

• Quick change arbor: The push-and-turn quick change mechanism lets users swap cutter heads rapidly and use a single arbor for multiple sizes, saving setup time on job sites.
• Replaceable pilot drill: The cobalt-steel split-point pilot drill reduces walking and improves first-hole accuracy for cleaner starts in metal work.
• Precision carbide teeth: Carbide teeth offer sharpness and cutting consistency required for stainless steel and other tough materials.
• Flange stop: The built-in flange stop prevents over-drilling so users can control final hole depth more reliably.
• Ejector spring on larger heads: Slug removal is made easier on sizes above 3/4 in thanks to the ejector spring, reducing downtime when clearing cut material.
• Minimum chuck size: Works with drill chucks down to 3/8 in, keeping it compatible with many common corded and cordless drills.

Who It's For

Electricians, HVAC installers, and metal fabricators who frequently cut holes in sheet metal and stainless panels will appreciate the quick change system and durable cutting faces. The arbor is aimed at professionals or serious DIYers who need a flexible solution for cutter heads between 2-3/8 in and 3 in.

Those who rarely cut metal, need sizes outside the 5/8 in to 3 in removable head range, or who prefer complete hole saw kits with multiple arbors might look elsewhere. Also, buyers expecting an all-plastic, consumer-level tool should be aware this is built for industrial use and replacement parts maintenance.

Pros & Cons

Pros

• Quick change design speeds head swaps and reduces downtime on site.
• Replaceable cobalt pilot drill with split-point tip improves accuracy and prevents walking.
• Precision carbide teeth and durable construction deliver strong cut quality, including on stainless steel.

Cons

• Some customers report mixed durability, with occasional breakage under heavy misuse, so proper technique is important.
• The product is an arbor only; cutter heads must be purchased separately for sizes outside the included range.

Specifications

Product Type	Hole Cutter Arbor
Size Range	2-3/8 in to 3 in
Shank	1/2 in
Minimum Chuck Size	3/8 in
Package Dimensions	16.764 cm L x 8.636 cm W x 3.81 cm H
Package Weight	0.595 lbs
Country of Origin	China

Our Verdict

The Greenlee 645-022 arbor is a practical choice for professionals who need fast head changes and accurate drilling in metal, especially stainless steel. It offers good value when paired with the correct cutter heads, and the replaceable pilot and flange stop make it a dependable workshop tool, provided users follow proper drilling technique to avoid stress-related breakage.

Frequently Asked Questions

Does this arbor work with multiple cutter heads?
Yes, the quick change arbor is designed to accept removable cutter heads from 5/8 in through 3 in so the same arbor can be reused for several sizes.

Will it drill stainless steel?
Customers report it cuts stainless steel effectively due to precision carbide teeth and a cobalt-steel pilot, though technique and feed rate matter for durability.

What drill chuck size is required?
The arbor requires a minimum drill chuck of 3/8 in and uses a 1/2 in shank for secure mounting.