Bi-Metal Hole Saw Set 3/4in-2-1/2in - Durable, Fast Cutting

In this review the GMTOOLS Bi-Metal Hole Saw Set is evaluated for tradespeople and serious DIYers who need a dependable, general purpose kit for metal, wood and plastic. The bottom line: this 14-piece set stands out for its professional quality bi-metal construction and fast chip removal, making it a practical choice when durability and clean, deep cuts matter. It is best for users who frequently cut differing hole sizes and want a single organized kit with arbors and drill bits included.

Key Features

• Bi-metal construction: A flexible steel saw body mated to M42 high speed steel teeth provides improved wear resistance for longer life when cutting tougher materials.
• Efficient cutting: Positive rake angle and deeper gullets help the saws cut quickly and eject chips to reduce binding while drilling.
• Wide material compatibility: Designed to handle metal, wood, PVC pipe, drywall, plywood, sheet metal and aluminum for versatile jobsite use.
• Complete kit: Includes 11 saw blades from 3/4in to 2-1/2in with large and small mandrels plus a medium adapter and a plastic case for organized storage.
• Easy plug removal: Wide slot design assists with removing the cut plug without extra tools, saving time between cuts.

Who It's For

This set is aimed at electricians, plumbers, HVAC technicians and serious DIYers who regularly cut holes of different diameters in mixed materials and need a durable, all-in-one kit. The included arbors and drill bits make the set ready to use with most drills, reducing the need to piece together components from separate purchases.

Users who only need one or two specialty sizes or who require ultra-precision hole saws for fine cabinetry may prefer single, purpose-made saws. Also, those who must cut depths beyond the roughly 46mm cutting depth should consider alternative options.

Pros & Cons

Pros

• Durable M42 cutting teeth provide longer life compared with basic hole saws.
• Faster chip removal and positive rake angle reduce bind-up and speed up repetitive cuts.
• Comprehensive size range plus two arbors and an adapter cover many common hole needs.

Cons

• Cutting depth is about 46mm, which limits thickness of material for through-cuts on larger diameters.

Specifications

Brand	GMTOOLS
Set contents	11 saw blades (3/4in to 2-1/2in), 1 large mandrel, 1 small mandrel with medium adapter, case
Cutting teeth	M42 high speed steel
Saw body	Flexible bi-metal steel
Cutting depth	About 46mm
Materials	Metal, wood, PVC, drywall, plywood, sheet metal, aluminum, plastic

Our Verdict

The GMTOOLS Bi-Metal Hole Saw Set is a solid, value-oriented kit for professionals and hobbyists who need a broad range of hole sizes and long-lasting performance. With M42 cutting teeth, good chip clearance and a practical case, it saves trips to the toolbox and handles mixed materials well, though the 46mm cut depth should be considered for very thick workpieces.

Frequently Asked Questions

Can these saws cut through sheet metal?
Yes, the M42 teeth and bi-metal construction are intended for cutting sheet metal and other metals listed in the specifications.

Are the arbors included compatible with standard drills?
Yes, the set includes a large and small mandrel plus an adapter, making them compatible with most corded and cordless drills.

How is plug removal handled?
The saws have a wide slot and deeper gullets to make plug removal quicker and easier during repetitive work.