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

Works pretty well. Not extremely sharp but has large enough teeth that the average person can sharpen them with a small file if need be. It’s quite well-built and has worked well on a dozen holes for me and plywood and sheet rock.

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.

This one is perfect for holes in the wall, but metal is not recommended

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

I used this hole saw to install an electrical box in a plaster wall with 2 X 6 lumber behind. It bored through the plaster and wood with ease.

No problems easy set up and use

I needed to cut a perfect 4 inc hole hole in an acrylic panel for our bathroom shower system. This hole saw was perfect, most likely will only be used once but for the money it was perfect.

Bought this to drill holes for corn hole boards I make. Works decent for this task, but I would use it on metal. The spring on the drill is a bit odd and I am not really crazy about it... I honestly dont think it will last so not too worried about it. I am also not too crazy about how the drill holder mounts to the saw portion. The quality of the saw seems good and will last for my needs. Overall, for the price and how I use this, it works fine and I happy with my purchase.

Product needed a half inch drill, I only have a 3/8 drill. Bit was not fastened to hole saw and came loose every time I tried to use it. Could not be tightened any tighter.

Tends to lock up a bit and the drill will detach unless you really tighten it. Overall got the job done.