4 Inch / 102mm Hole Saw for Wood, Plastic Board, Ceiling,Drywall, and Metal Sheet - HSS Bi-Metal Hole Cutter with Pilot Drill Bit

This did a great job for me. I went through 108-year-old siding, 2x materials, and aluminum siding. I had to go outside to finish because it was not deep enough to get through everything, but it held up and is ready for the next job.

For the price this is great! I've used it to cut several dozens of holes in wood and around 10 in 20ga steel. Still cuts effortlessly and most important cleanly. The only minor complaint is I've had to retighten the attachment 4 or 5 times as it somehow seems to keep coming loose while this is tossed in my tool bag. I'd take about a quarter star off for that. Still 5 stars overall.

I needed a 3-inch hole in the top of a bucket, and this did the trick. It's very sturdy and cuts well.

it will not cut thru a metal cased door. it will spin and try its best. I suppose it will work great on wood, no metal. very sharp.

I drill holes into hard gourds for birdhouses. I love the spring around the drill bit that keeps the round core from cramming into the drill. Works good, drill is sharp, holds it's place for safety, and makes a smooth crisp hole.

Functionality:Good blade. Cuts a hole an inch bigger then my 5" hole saw

Great quality and price.

Umm, okay so the saw screws onto the bit holder and then... Screws itself off as soon as you go to cut. Perfect.The central bit BROKE the first time I tried to cut anyway, just in case the pressure was supposed to keep it on? There's no instructions, so I was absolutely guessing about trying to make this work, but breaking without so much as drilling a single hole is absolutely unacceptable.