MK Morse M35PS Hole Saw Arbor 3/8-Inch Hex Boxed, Fits AV20 - AV96

Works well with my Milwaukee & Dewalt hole saws. The first time I used it, I predilled the pilot hole, so I could see exactly where I was drilling. Having a predilled hole I had no way of noticing that the center drill bit had stopped turning & by the time I had finished the first hole, the setscrew had vibrated out & was lost. If you buy this product, make sure the setscrew is tight before using the arbor for the first time. Better quality control would have shipped the arbor with a tightened setscrew, so it made me question the quality of the product, but so far so good.

This arbor works great with my MK Morse hole saws. I've used it to drill large holes in everything from 2x4's to making fan holes in computer cases. It's 3/8ths inch so it fits my rechargeable Makita drill nicely.However, one thing I want to point out, AMAZON CHARGED ME FOR A NEW ONE AND SENT ME A USED ONE. When I opened the Amazon box it came in, I noticed the arbor's box had been ripped open and the arbor had little bits of sawdust stuck to it. I'm not happy with Amazon selling me a used product. But I can't really deduct a star from the arbor when it's Amazon that's really at fault here.

This tool is solidly built but misalignment between the pins on arbor and the holes in the hole saw makes it next to impossible to attach to the hole saw properly. You can either have the pins in place and have the hole saw loose (as a previous reviewers have noted) or tighten it down but not have the pins in place and hope it doesn't come loose in the middle of your cut. I tend to opt for the latter because it produces the best results, however, it's an unwelcome compromise. I have had better luck with cheaper hole saw systems in the past.

Bought this to work with a 3 1/2 inch hole saw. After about 10 minutes of drilling, the 3/8" chuck stripped the shaft of this Arbor. I was using a 3/8" drill that was in good condition and tightened. I would recommend if you are using any hole saw over 1" that you move up to the 1/2" drive drill and arbor. This one was too weak for a 3 1/2 inch. Went to Lowes and got a 1/2" arbor, used my 1/2" DeWalt drill and it went through 2" thick boards without any problems.

After trying to cut a 4 1/2 inch hole in a piece of aluminum, I'm sad to say this item caused an insane amount of wobble that I was not able to complete my project. The problem seems to be that the hole that is supposed to hold the drill bit wasn't drilled very well. I would return it but it isn't worth the shipping cost so I will have to live with it and find another better arbor.

I just used some pipe tape, twisted like rope at the base to take up the slack and make everything snug.

works but this could be why it's wobbly

This worked as expected with the AV68 Hole saw I purchased. I love the way the pins lock into the saw so the threads are not over tightened. I have only needed to use this once but was totally happy with the performance.