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

worked as expected.

Save yourself some time and buy a name brand 4” hole saw bit. This item arrived and threads were cut in the bit at an angle. Kind of hard to use a hole saw when your pilot bit is at about a 60-70 degree angle when it should be a true 90 degrees. Wtf??

This is a decent, cheap hole saw that gets the job done. I used it to cut holes in ceiling drywall to install remodel 6” recessed can lights. Unfortunately, this saw measures slightly under 6”, so the resulting holes were not large enough to fit the cans. I had to enlarge them a bit with a drywall saw, which then defeated the purpose of using a hole saw to make clean cuts and minimize dust in the first place. Also doesn’t last very long… it was adequate for what I needed without breaking the bank, but you get what you pay for.

The center arbor hole was threaded crooked resulting in such severe wobble. Not usable without modification. Got thru the 2 holes I needed to drill.

Works as expected, great value for the money.

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.

I used it to cut drywall for recessed LED lighting.

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.

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.

It looked like a decent holesaw but the main piece you need was to small of size to even fit the hole so it is useless spend a little more and buy from a big box store then you wont have to wait for replacement and hope its right!