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. Cutting out a vent hole and hit a bunch of nails and it didnt harm the blade at all. Definitely worth money.

Lasted about 5 minutes

Liked it, drilling a hole

not so great for stainless steel

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.

Did the job

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.

Cuts drywall without damaging wall finish Proper size for electrical box

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.

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.