Greenlee 645-2-1/2 Hole Cutter Stainless Steel - Quick Change Cutter

In this review the Greenlee 645-2-1/2 Hole Cutter proves to be a focused tool for tradespeople who routinely cut stainless steel and other thin metals. The single biggest reason to buy is its quick change system and precision carbide teeth, which together make repeated hole cutting faster and cleaner than many generic hole saws. The package dimensions and modest weight also make it easy to store and carry in a toolbox, and the replaceable pilot drill and flange stop add practical touches that matter on the jobsite.

Key Features

• Quick change arbor: Allows the user to swap cutter heads with a simple push and turn, saving time when changing sizes.
• Precision carbide teeth: Provide durable cutting performance and maintain sharpness for clean holes in stainless steel.
• Replaceable pilot drill: The cobalt-steel pilot with split-point tip reduces walking and improves drill accuracy without a center punch.
• Flange stop: Prevents over-drilling so holes are more consistent and reduce the risk of damaging the workpiece.
• Ejector spring on larger sizes: Speeds removal of the slug on sizes above 3/4 in, making repetitive cuts less fiddly.

Who It's For

The Greenlee 645-2-1/2 is best for professional electricians, sheet metal workers, and serious DIYers who need a hole cutter optimized for stainless steel and similar metals. Its quick change arbor and carbide teeth are particularly beneficial when cutting many holes of varying sizes on a single job.

Those who rarely cut metal, who need a full hole saw kit of many sizes, or who primarily work with very thick material should look elsewhere; the design and features are focused on efficiency and accuracy for thin-to-medium gauge stainless and metal work.

Pros & Cons

Pros

• High quality carbide teeth deliver clean cuts and good edge sharpness for stainless steel work.
• Quick change arbor system saves time when swapping cutter heads and uses a common arbor for multiple sizes.
• Replaceable cobalt-steel pilot drill with split-point tip improves drill accuracy and reduces walking.
• Compact package size and light weight make it easy to transport and store in a tool bag.

Cons

• Some users report mixed durability, with occasional breakage under heavy use, so it may not suit extremely abrasive or high-torque applications.
• Designed for thin-to-medium metal; not intended as a solution for cutting very thick plate or hardened materials.

Specifications

Product	645-2-1/2 Hole Cutter
Cutting Head Size	2-1/2 in
Teeth	Precision carbide teeth
Pilot Drill	Replaceable cobalt-steel split-point
Minimum Chuck Size	3/8 in
Package Dimensions (L x H x W)	11.684 cm x 3.81 cm x 16.002 cm
Package Weight	0.45 lb

Our Verdict

The Greenlee 645-2-1/2 Hole Cutter is a solid choice for professionals and dedicated DIYers who need reliable, accurate holes in stainless steel. Its quick change arbor, durable carbide teeth, and replaceable pilot drill make it good value for anyone doing repetitive metal cutting, though users should be mindful of its limits on very heavy or abrasive work.

Frequently Asked Questions

Can this cut 304 stainless?
Yes, customers report the cutter handles 304 stainless well when used with appropriate feed rate and lubrication.

Will the arbor work with other Greenlee sizes?
Yes, the quick change arbor is the same for different size cutting heads so you can swap heads without a new arbor.

What is the minimum drill chuck size?
The minimum chuck size required is 3/8 in.