JIECHENG Bi-Metal 4 inch Hole Saw with Arbor Mandrel for Cutting Wood,Cornhole Boards,Drywall,Plasterboard,Plywood,Steel,Aluminium,Brass,Copper,Zinc,Tin,102mm

There are a lot of review that say the blade dulled after one cut, or the threads stripped, etc. I had none of those issues. I bought this to drill holes in my RV floor, which is 3/4 plywood. Four successful holes later, its still pretty sharp and totally usable for future projects. You do have to watch when you stop the drill that if the saw is in free space, inertia will keep it spinning and it will unscrew from the arbor. After I cut a few holes, it was firmly screwed down to where I cant even unscrew it anymore, so the unscrewing was a temporary problem for me. I guess because I was expecting something unusable, I am really pleased with how it worked. Not for cutting metal for sure, but if you just want a few holes in plywood or sheetrock, this is a great cheap alternative.

A bit heavier than anticipated, but this leads to longevity. It did the job well.

A bit heavier than anticipated, but this leads to longevity. It did the job well.

This saw and arbor feel solid and looks like it’s a good price/quality ratio.

I used it to cut drywall for recessed LED lighting.

If u plan on using this buy a different arbor. First use the arbor strips the threading. U need a arbor that has the 2 prongs poking into the saw. If u don’t, to much force and its game over. It’s almost worth just buying a saw that comes with the better arbor. Even going slow on drywall the thread will strip. I used mine for a hole for a dryer vent and I couldn’t even make it past the drywall.

Save your money. I had a simple project and needed just two holes. First, the saw does not screw onto the hole saw arbor straight. This causes it to wobble once you have it on your material because it will not sit flush. On the second hole while going through plywood the drill bit completely sheared off. I was also not able to make the second cut because the teeth have nearly sheared completely down.

Used for installing a kitchen hood unit air exhaust in side of house. Only used once. Did the job well. Nice clean cut. Perfect 6” hole. Can’t attest to longevity as this was a one and done use for me. But based on my experience, I would recommend!

No problems easy set up and use

A bit heavier than anticipated, but this leads to longevity. It did the job well.