Flintronic Bi-Metal Hole Saw, 110mm (Bi-Metal M42) for Metal, Wood & Plastic
Product description
The essentials
A 110mm bi-metal hole saw is one of those tools you buy once and then quietly reach for whenever you need a clean, round opening—whether that’s for lighting, ducting or cable routes. This Flintronic hole saw is built around an M42 high-speed steel and bi-metal cutting section, with the idea that it can handle tougher materials than basic saw kits.
On paper, it’s designed to cut faster and more consistently thanks to carbide-related hardness improvements and tooth-shape optimisation. The practical angle is the “smooth and fast cutting” claim, plus an edge design that’s meant to reduce tearing and give a more accurate diameter.
That said, it’s still a hole saw: results depend quite a lot on your drill press/hand drill setup, material thickness, and whether you keep within the recommended speed. If you’re expecting it to behave like a dedicated specialised cutter for one single material type, you may be a bit disappointed.
Key features that you’ll notice in use
The headline features here are the cutting materials and the tooth design. The cutting part is described as using higher hardness (≥64HRC) with improved toughness, using M42 and bi-metal construction. The manufacturer also mentions rust-proof, wear-resistant performance and long service life—again, plausible for this kind of build, but of course real-world wear still depends on how often you use it and at what speed.
Where it gets more “buyable” for everyday jobs is the attention to chip removal. There’s a chip-removal hole designed to clear chips quickly to help prevent cracks and stuck parts, and the drill bit’s spring is stated to push the wood chip disc out of the saw once the cut is finished. If you’ve ever had a hole saw bind or leave a messy plug, you’ll appreciate this design intention.
It also claims accuracy: the arc design is said to have high concentricity accuracy and a uniform tooth edge, and the difference in cutting diameter is allowed to be less than one millimetre. That’s exactly the kind of detail that matters when you’re trying to fit fixtures neatly.
Tech specs
- Name: Flintronic Bi-Metal Hole Saw, 110mm
- Type: Bi-metal hole saw cutter (with high-speed steel drill bit attachment)
- Material: M42 high-speed steel and bi-metal
- Cutting hardness: ≥64HRC
- Cutting speed guidance: RPM ≤ 1000 when used for a long time
- Diameter: 110mm
Where it shines (and where it may fall short)
Worth considering if you want one hole saw that can cover a broad mix of jobs—wood, plastic, plywood, drywall, fibreglass and PVC board are mentioned, plus it’s also described as suitable for metals such as mild steel, stainless steel, cast iron, bronze, copper and aluminium. That breadth is useful if your workshop tackles mixed materials rather than specialising.
It also fits common installation-style tasks: the description calls out holes for can lights, recessed lights, air ducts, ceiling lights and speakers. In a typical scenario, you’d mark your centre point, clamp or secure the workpiece, then drill slowly to start the cut and keep the chips clearing so the edges don’t bind.
The limitation to keep in mind is the speed guidance: when using the kit for a long time, you should control speed and stay at RPM ≤ 1000. Go faster than that for extended use and you risk accelerated wear. Also, “suitable for many materials” doesn’t automatically mean it will perform equally well across all of them—some materials often demand different feed rates and technique.
What to check before you buy
First, confirm your setup: hole saws behave differently on a bench drill, drill press, or a handheld drill. The description specifically mentions bench drills, drill presses, gun drills and various hand drills, so it’s intended to be flexible.
Next, double-check the requirement for a 110mm opening. If your project needs a slightly smaller or larger diameter, it’s usually better to match the hole saw size rather than trying to “work it bigger”.
Finally, pay attention to the note about storage/coating: the product is coated with a thin layer of protective oil (anti-oxidation, anti-rust). That’s normal, but do be careful not to get it dirty—wipe it down if it attracts grime, and keep an eye on the saw’s condition.
Is it worth it?
This Flintronic 110mm bi-metal hole saw is a solid pick if you’re doing mixed-material cut-outs—especially when you want smoother, faster drilling with decent concentricity and chip removal to reduce binding. It makes sense for installation work like lights, speaker openings and duct holes, where getting the cut cleanly matters.
You may want to skip it if you’ll mainly be cutting one very specific material repeatedly under heavy-duty conditions and you’re chasing the very best performance for that single task—because even with bi-metal construction, technique and speed control will still decide how well it holds up. Also, if you can’t reliably keep speed under control (the note says RPM ≤ 1000 for long use), it may not be the wisest long-term choice.
Mini FAQ
Can it cut through wood and plastics?
Yes. The description lists wood, plastic, plywood, drywall, fibreglass and PVC board, and it also references fast cutting and smoother chip removal.
Is it only for soft materials?
No. It’s also described as suitable for a range of metals including mild steel and stainless steel, plus cast iron, bronze, copper and aluminium.
How do I avoid rough or stuck cuts?
The kit is designed with a chip-removal hole and a spring to push the disc out after cutting. You’ll still want to secure the workpiece and control speed, the note suggests RPM ≤ 1000 when used for a long time.
Does it come coated for rust protection?
The surface is stated to have a thin layer of protective oil for anti-oxidation and anti-rust. It’s worth checking/cleaning lightly before use so it doesn’t pick up dirt.