ABuff 4 inch 100 mm Hole Saw with Arbor, Heavy Duty 38mm Depth Bi-Metal HSS 4 Inch Hole Saw Blade with Positive Rake Teeth for Cutting Soft Metal, Drywall, Plastic, Wood, Fiberboard

Teeth wore done after drilling thru two 1/2 boards. Junk

The product is good quality and comes with multiple bits, however if you want to use it to cut sheet metal holes for HVAC holes this is not a good hole saw to use. Basically the bit just keeps enlarging the pilot hole and the saw itself just mars the surface. Ended up using a jigsaw following the mar the hole saw made. I suspect the teeth are too large.

I used this hole saw to cut two holes in a 3/4 shiplap ceiling for fans. Worked quite well and the teeth on the saw look to be just as sharp as when I started. As others have mentioned it does required a 1/2 inch drill.

This hole saw cuts great and overall does a good job. Only reason I gave it a 4 instead of a 5 is because it had a little manufacturing defect and due to time constraints I chose not to send it back. The set screw hole was not properly threaded and the set screw would not hold. I was able to redrill and rethread the hole myself and use a slightly larger set screw. Other than that this hole saw is a good buy.

I cut the drywall with my 18V cordless drill which was a little clunky. Love the complete kit and ease of assembly. It would work better if I used the drill with a cord.

If you have an arbor already that works with your tools you most likely wont need this one. I have a small hole saw set, but I chose to buy this saw with the arbor in case the ones I have did not fit. Turns out the arbor with this hole saw is too fat for any of my drills. Fortunately my existing arbors fit perfectly.

Nothing

I really liked this product well worth money

It was needed.

So far I have bored through heavy plastic (installing vents in a double panel plastic shed) and light wood. Not sure how they would handle metal or thicker wood but as i said this is a great set for the price. Handy when you need it. I recommend if the workload isnt too excessive.