MaxTool 5-1/4 in Bi-Metal Cobalt Hole Saw - Deep Cut Performance

In this review the MaxTool 5-1/4 in bi-metal cobalt hole saw is evaluated for tradespeople and DIYers who need a durable cutter for thin metal, pipe, plastic and wood. The single biggest reason to buy is its premium cobalt HSS construction and vacuum-hardened teeth that deliver clean, low-vibration cuts and long wear when working through sheet metal and other common workshop materials. It is not intended for masonry, tile or concrete, but for its intended uses it performs reliably and offers good value for the price.

Key Features

• Premium material: Made from cobalt high speed steel for higher heat and wear resistance when cutting through metal and composite materials.
• Deep cut-depth: 1.5 in cut-depth allows one-pass drilling through thicker sections of pipe, wood or layered materials without needing multiple passes.
• Optimized teeth: 4/6 tip tooth geometry and vacuum-hardened teeth provide smoother cutting load and reduced vibration for cleaner holes.
• Core ejection: Multiple knock-out slots speed core removal so the tool can be returned to work faster between cuts.
• Stability: Thick hardened backing plates resist warping under load to keep the saw round and accurate over repeated use.
• Thread compatibility: Fits common 5/8-18 UNF arbors used in many power drills and hole saw arbors with matching thread types.

Who It's For

The MaxTool bi-metal hole saw is best for metal workers, plumbers, electricians and serious DIYers who regularly cut holes in thin metal sheet, ducting and pipe, or in wood, plastic and composite panels. Its cobalt HSS construction suits applications where heat and abrasion would quickly dull lesser hole saws.

It is not suitable for cutting masonry, concrete, tile or stone; contractors who need a dedicated masonry solution or large-format tile cutters should look elsewhere. Also choose a different tool if you require depths greater than 1.5 in or sizes not available in this holesaw line.

Pros & Cons

Pros

• Durable cobalt HSS and vacuum-hardening deliver long cutting life and resistance to wear.
• 1.5 in deep cut allows one-pass holes through pipes and layered materials, saving time on the job.
• Knock-out slots and thick back plate make core removal easy and prevent warping for consistent cuts.
• Users report clean cut quality and good value compared with older units they own.

Cons

• Not intended for masonry, tile, concrete or similar materials, limiting use to softer substrates.
• Requires a compatible arbor with 5/8-18 UNF thread, which may need to be purchased separately if not already owned.

Specifications

Brand	MaxTool
Diameter	5-1/4 in (133 mm)
Material	Bi-metal cobalt high speed steel (HSS M42)
Cut-depth	1.5 in
Thread	5/8-18 UNF compatible
Intended materials	Thin metal sheet, pipe, plastic, wood, composite
Not for	Asphalt, brick, concrete, tiles, marble

Our Verdict

The MaxTool 5-1/4 in bi-metal cobalt hole saw is a practical, value-minded choice for professionals and experienced DIY users who cut holes in metal, pipe and mixed materials. Its cobalt HSS construction, deep cut-depth and core ejection features deliver clean, reliable performance and reduced downtime, making it a sensible buy for those who need durability without premium specialty pricing.

Frequently Asked Questions

Will this cut stainless steel?
Yes, the cobalt HSS teeth are suitable for cutting thin stainless steel sheet and pipe, but use proper speed and cooling to extend tool life.

Does it come with an arbor?
The saw fits 5/8-18 UNF arbors but typically is sold as the cup only; confirm whether an arbor is included or purchase a compatible arbor separately.

Can it cut tile or concrete?
No. This bi-metal hole saw is not designed for masonry, tile, concrete or similar hard stone materials.