Yougfin Hole Saw,Bi-Metal Hole Saw Kit 18 PCS Heavy Duty Hole Cutter with Carrying Case,Ideal for Metal,Cornhole Boards,Wood,Plastic,Drywall

It is exactly 4 and worked perfect for me on the wood. Dont really think it will last long against steel. Not bad for price compared to home depo or lowes.

Guide bit broke off part way through the first hole - junk tools.

purchased to drill poly tank was very poor quality barely drilled one hole and arbor unscrewed from bit

I bought this specifically to cut holes in my popcorn ceiling for recessed lighting. It was not a problem at all cutting through the drywall.

Didnt seem as sharp as I thought they would be..but got the job done

Broke after 30 seconds of use

For at least two of the larger saws, the holes do not line up with the arbors pins. Im returning it and buying a brand name set.

Works as intended. Good hole saw for my needs.

Kit works great have had the opportunity to use 4 different sizes and makes a hole

Saws are very sturdy and system is very secure in holding the blades. Well worth the money. I would buy again.