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Whether you're installing door hardware, running conduit through studs, or cutting clean holes in tile for plumbing, a quality hole saw is an essential tool in any professional or DIY arsenal. But with so many material options—bi-metal, carbide, diamond, and more—it's easy to get confused about which one to reach for. The wrong choice can lead to burned edges, broken teeth, or frustratingly slow cuts.

In this guide, we'll break down the two most common types of hole saws: bi-metal and carbide. You'll learn how each performs on wood, metal, tile, and masonry, and we'll share tips on building a versatile hole saw set that covers your most frequent jobs. We'll also highlight some of the best Milwaukee hole saw solutions, including the legendary Hole Dozer line, so you can make an informed purchase.

What Is a Bi-Metal Hole Saw?

A bi-metal hole saw is made by welding a high-speed steel (HSS) tooth edge to a tough, flexible steel body. This combination gives you the hardness needed to cut through metal and wood while maintaining the durability to resist cracking under stress. Bi-metal saws are the most versatile option for general construction, electrical, and plumbing work because they handle a wide range of materials without needing frequent blade changes.

Most bi-metal saws feature variable-pitch teeth that reduce vibration and produce smoother cuts. They are ideal for cutting through drywall, plywood, softwood, hardwood, PVC, and even thin-gauge metal like steel studs or electrical boxes. However, they are not designed for abrasive materials like tile, brick, or concrete—those will quickly dull the teeth.

• Best for: wood, drywall, plastic, thin metal (up to 1/8 inch)
• Not for: tile, stone, brick, concrete, or thick metal
• Typical lifespan: 20–50 cuts in wood, 10–20 cuts in metal (varies by brand and use)

What Is a Carbide Hole Saw?

Carbide hole saws use teeth made from tungsten carbide—an extremely hard, wear-resistant material. These saws are purpose-built for cutting abrasive materials that would destroy a bi-metal blade. They excel in tile, porcelain, ceramic, fiberglass, and even some masonry applications. Some carbide saws feature a diamond-grit edge for even longer life on the hardest surfaces.

Because carbide is brittle, these saws require careful handling—they can chip if twisted or forced. They also tend to be more expensive than bi-metal saws. For pros who regularly cut tile or stone, a carbide hole saw is a worthwhile investment that saves time and reduces blade changes. Many Milwaukee carbide hole saws include a pilot bit and arbor designed for low-vibration drilling.

• Best for: tile, porcelain, ceramic, fiberglass, some masonry
• Not for: thick metal, wood (unless specifically rated)
• Typical lifespan: 50–100+ cuts in tile (depends on material hardness)

Bi-Metal vs. Carbide: Head-to-Head Comparison

To help you decide quickly, here's a side-by-side comparison of the two main hole saw types across key performance factors. Keep this table handy when you're stocking your toolbox or ordering a hole saw set for a specific job.

• Material cutting: Bi-metal handles wood, metal, plastic; carbide handles tile, stone, fiberglass
• Cost: Bi-metal is more affordable; carbide is premium-priced
• Durability: Bi-metal resists cracking; carbide resists wear but is brittle
• Cut speed: Bi-metal cuts metal faster; carbide cuts tile faster
• Best use case: Bi-metal for general construction; carbide for finish work and tile

How to Choose the Right Hole Saw Set for Your Work

If you're building a hole saw set from scratch, start with the sizes you use most often: 1/2, 3/4, 1, 1-1/4, 1-3/8, and 2 inches cover most electrical and plumbing needs. A quality bi-metal set like the Milwaukee Hole Dozer line offers long life and clean cuts in wood and metal. For tile work, add a few carbide sizes in common plumbing diameters (1-1/4, 1-1/2, 2 inches).

Don't forget the arbor and pilot bit—many hole saws require a separate arbor to attach to your drill. Milwaukee's quick-change arbors make swapping sizes fast and easy. Also consider a hole saw kit with a carrying case to keep your set organized on the jobsite.

• Tip: For occasional use, a bi-metal set is more cost-effective. For frequent tile work, invest in a dedicated carbide set.
• Tip: Always use cutting oil when cutting metal to extend blade life and reduce heat.
• Tip: Run your drill at a slower speed for metal and tile; higher speed for wood.

Milwaukee Hole Dozer: A Trusted Name in Hole Saws

Milwaukee's Hole Dozer line is one of the most popular hole saw families on the market. These bi-metal saws feature a unique tooth geometry that cuts faster and lasts longer than standard designs. They come in a wide range of sizes, from tiny 3/4-inch diameters up to 6 inches for large openings. Many pros choose Hole Dozer for its consistent performance in wood, metal, and plastic.

For those who need to cut tile or masonry, Milwaukee also offers carbide-tipped and diamond-grit hole saws. These are engineered to stay sharp through dozens of cuts in porcelain and ceramic. Pairing a Hole Dozer bi-metal set with a few carbide tile saws gives you a complete solution for almost any hole-cutting job.

Common Mistakes to Avoid When Using Hole Saws

Even the best hole saw will fail if used incorrectly. One common mistake is forcing the saw through the material—let the teeth do the work. Another is using too high a speed, which generates excessive heat and dulls the teeth. Always match your drill speed to the material: slow for metal and tile, medium for wood. Also, make sure your pilot bit is sharp and properly centered to prevent wandering.

Another mistake is using a bi-metal saw on tile or stone. This will quickly ruin the teeth and could damage your workpiece. Similarly, using a carbide saw on thick metal can cause chipping. Always check the manufacturer's recommendations before cutting. Finally, keep your hole saw clean—built-up debris can cause binding and overheating.

Building a Versatile Hole Saw Kit for the Jobsites

A well-rounded hole saw kit should include both bi-metal and carbide options. Start with a Milwaukee Hole Dozer set in the most common diameters (1/2 to 2-1/2 inches). Add a few carbide or diamond-grit saws for tile and masonry work. Don't forget a sturdy case to keep everything organized. Many pros also keep a separate arbor for each saw size to speed up changes.

If you work primarily in wood and metal, a bi-metal-only kit may be sufficient. But if you ever encounter tile, stone, or fiberglass, a carbide option will save you time and frustration. Consider the M18 18-Volt Lithium-Ion Cordless Combo Tool Kit (16-Tool) as your power source—it includes a hammer drill that handles hole saws with ease.

Choosing between bi-metal and carbide hole saws doesn't have to be complicated. For general construction and metal work, bi-metal saws like the Milwaukee Hole Dozer are your best bet. For tile and abrasive materials, invest in a carbide or diamond-grit saw. Building a versatile hole saw set with both types will prepare you for almost any job. Ready to upgrade your hole saw collection? Explore the Milwaukee Hole Dozer bi-metal hole saw set and start cutting cleaner, faster holes today.