MK Morse AT23 1-7/16-Inch Carbide Tipped Hole Saw - Premium Metal & Wood Cutting Tool for DIY Projects & Professional Use

I found the teeth to be too aggressive. I had to drill thru 3/4" plywood subfloor and it continually binded up. As an electrician for the past 20 years and having drilled hundreds if not thousands of holes this bit was very difficult to work with. For the money and the small amount of holes I need it for it will work but if I needed to drill a lot of holes in wood I would look into something with more and smaller teeth.I bought this to drill thru metal and then redwood siding for the installationof the tankless water heater on the back side of my house. I have a goodselection of holesaws but ones that could cut thru 18 ga (?) sheet steeland have any life left are not amoung my collection. This has some life left.I used this hole saw on a 1-1/4" soapstone countertop. Because an arbor cannot be used in this application, I first drilled a hole in a piece of 1/2" CDX, clamped it to the counter, and then used it as a guide for the hole in the soapstone. It worked perfectly. One caveat to its use is that one must go slowly when using it. Be patient and be prepared to drill for 3-5 minutes. Rushing the job can bring unhappy results. Good luck!Purchased for cleanly cutting cable holes in commercial desktops made of 1"-2" laminated particle wood, which it does extremely well without dulling or burning (unlike bi-metal saws which can only be used for one or two holes before they dull).This product worked great on lath and plaster. At times I used it in combination with the another hole saw (E0206016 3-3/8-Inch RemGrit Carbide Grit Hole Saws, 86mm) which works greats on plaster but not as good on the lath portion. I switched/alternated with both. So far it has been used for about 20 holes with plaster and lath and no signs of being dull.You have to purchase the "Morse" Hole Saw Arbor? If so, that's nice to know. Returned! This Hole Saw requires a non-standard Arbor. This is not noted anywhere in the description or ad?? The drive pin holes on this Hole Saw are too small in diameter for any standard Arbor. The drive pins will not go through the drive pin holes and lock in place.. I spent 2 hours talking to the Hardware specialist.. I went to the stores to check at Home Depot, Ace, and Lowe's. The hardware store employees tried every Arbor they had to no avail. I purchased a "Spyder Tarantula" Carbide Tipped Hole Saw, which is sold everywhere for a few dollars more. ALL of the different Hole Saws available at the hardware stores that I visited were compatible with my standard Arbors. ALL had the same Drive Pin hole size!!I cut 18 recessed light holes in 1950's plaster ceilings. By the 18th hole this saw was not cutting nearly as well as the first hole. I knew going into this project that this is not the proper tool for the job. A carbide grit hole saw is the proper tool, however, those are nearly double the price. Since this is a 1 off job the carbide tipped did the trick. It performed as expected.I was going to buy a diamond tooth hole saw but this was cheaper and since I only had one hole to cut wanted to go as cheaply as possible. I was somewhat in doubt about the carbide tip, but it chewed right through the stone I needed to put a dryer vent through and the teeth seem as sharp as new after.