LANIAKEA 3-1/4-Inch Bi-Metal Hole Saw 83MM M42 Annular Hole Cutter HSS Variable Tooth Pitch Holesaw Set with Arbor Blue for Home DIYer

New speakers for boat needed a 5.13 inch hole - what? First of all that is 5 1/8 inch, second drilling in my gel-coat fiberglass is hazardous. This tool worked perfectly, clean cut with no chipping. Could not be more pleased.

I used this to cut holes in 3/4 inch plywood. Cut nice and clean. After 40 holes still cutting like new. As good as big brand name I recommend it

Worked for me... Still using.

Used it on fiberglass in my boat and it cut a perfect hole for a 6.5 speaker!

Doesnt cut as good as name brands.

My other hole saws attach and detach quickly from the mandrel. This saw is rather complex which I assume is to make everything lock tightly. It came with a retaining ring which was difficult to remove even with two sets of pliers. Finally got it off. Does that go back on after assembly. Who knows? There were no instructions, I had to look at the pics in the ad to make sure I was connecting everything correctly. . Those aligning pins were a pain to install. Havent used in on my drill press yet. A short video or instructions would have helped.

A bit of a chore to remove cutoff disks.

It may be huge but it cuts smooth. I cut through two walls with ease. This was a weekend project and ended in success due to this great hole saw.

Used this to drill a hole in my van to install a diesel heater, worked great.

Worked well. Good value