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

Broken part

Well made and the bi-metal is a plus. Good price. Fast delivery. I used it to install small canless LED lights where you want a nice clean cut to support the fixture. It has the side slots so that you can line it up on a mark easier. The bit is well anchored and comes with small Allen key wrench. The housing is nice a deep and thicker than hole saws that are cheaply made.

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.

The center bit broke in half on the outer wall. The teeth were not sharp at all. Its buy point is cheap for a reason.

Pretty good quality

The arbor does not fit in a 3/8 drill. I had to file it down. It does cut good and smooth .

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!

Needed to cut one hole in my soffit foot an exhaust fan. Did the job, though if I needed to cut more holes I’d buy something of better quality.

Bought this a I had 12 holes to drill in 1/2” drywall to install surface mount LED’s. On 1st hole the bit snapped and damaged my ceiling as it skipped across the ceiling. I sent it back and used a hand drywall saw instead. Wonder what would have happened if I attempted to cut plywood. They did refund me my money.

Dull drill bit,stripped set screw,soft metal not round, Save your money