5 inch HSS BI Metal Hole Saw Cutter 1-1/2 Depth with Big Arbor for Wood Metal

This is a well made 8 1/4” hole saw, very rugged. Overall. I’d say it works very well. I’m glad I bought it and it worked well for me recently. There are a couple of things to watch out for. First, be sure the drill bit is deeply seated before tightening the set screw. I made the mistake of screwing the set screw right into the center of the shaft. It was no fun to get back out, but I was able to do it. The second thing to remember is that an 8.25” hole saw is big. There are 25.9” of teeth spinning around…and grabbing the surface of the material you are trying to bore through. My drill spun around pretty abruptly when all of the teeth contacted the surface. My second two uses were much more civilized

I purchased this for cutting speaker holes in fiberglass (boat) I didnt want to spend $50 at one of the big box stores. The hole saw is good quality (better than expected) I would not hesitate to order another one.

I used this on a laminated veneer shiplap ceiling where I was making the cuts where the boards butted up to each other. The boards were about 5/8” thick. No issues. You eat a lot of dust but the cuts were perfect and smooth. The 6-3/8” hole was perfect for Torch Light ultra thin recessed lights.

Pleased with the quality of the item. The threaded/pin-type arbor is essentially identical to those Ive purchased from Morse, Lennox, Milwaukee etc. They all have threads that do not run all the way to the back plate which means that when you screw the arbor down to contact the back of the hole saw, few threads are left engaging with the hole saw. If the pins back out due to vibration etc, it is easy to strip the threads. I wish the manufacturers would figure out how to thread the arbor all the way down to the back plate. I put a thin fiber washer with holes drilled out for the pins on first, screw down the arbor and then twist a rubber band around the hexagonal shaft and knurled pin adjusting knob to keep everything in place...

Bought the 5” hole saw to use on 1/2 inch plywood, and in a 2x8 board. Was impressed by the quality, given how inexpensive it was. The arbor is good quality and came with two drill bits, plus a small hex wrench for the set screw. Was very sharp and have a very clean cut. Only needed it for a small job, so can’t speak to how long it will hold up after many uses. But would not hesitate to buy another one if I need a different size in the future.

Used this for outside high hats and inside high hats. Works perfectly. Great buy.

Not sure what others are doing wrong... some of the reviews complained about strength of the mandrel and such but I really put it through its paces drilling at least 7 through various layers of old siding and the sill without an issue. I really does bite hard so for the 5.5 bit Im glad I had a high torque low speed drill. Note this mandrel on the 5.5 will need a 1/2 drill chuck at least (typical 3/8 wont fit).

We got this to help us make corn hole boards. Makes quick work of it! Just attached to a typical cordless drill and went for it. Worked for us!

If you want to cut a hole for a 4” exhaust pipe, then you’ll be wanting a hole slightly bigger than 4”. This will cut that hole, probably. On my house it cut through cement fiber board (Hardie Board) and wood sheathing. You’ll need something different If you’re going through concrete (perhaps obviously). I was pleased with the weight and apparent hardness of the blade. I only had to cut a single vent hole, so I can not speak to long term durability. Here’s a tip if you’re putting in a vent and you’ve not done something like this before: drill a small pilot hole where you want the big hole to be. In my case, I went into the attic and drilled a small hole through the wall where I wanted to vent out. This way I could be sure to cut the hole where I wanted and be confident I wasn’t going to hit a stud, wiring, or some other sort of surprise. Then, make the big cut from the outside so that you get a nice clean edge in your siding. Good luck!

Worked great for 5” Halo Old Work Can lights.