Mollom Heavy Duty Carbide Hole Saw, Hole Cutter cuts Stainless Steel, mild Steel, Iron, Copper, Brass, Plastic (3 76mm)

Great tool for drilling hole in shipping containers to install vents. Go slow at a angle, with coolant, cause that corton steel is hard. This hole saw stands up to the test.

Cut the size I needed and hardly looks used.

Owned this 1” (25 mm) hole saw for all of 14 hours, the carbide teeth lasted about 2 minutes while drilling low carbon mild steel. I bought this bit hoping to drill 6 super smooth holes in 1/4” mild steel as I had purchased a smaller 3/4” bit from another source that worked great in the same material and much harder material. All the teeth on this bit broke off with only 60 percent of the first hole cut. Bit is Completely unusable now check the photo. For reference, I finished cutting the first hole with a regular bi-metal hole saw that was countless years old and literally missing 3 teeth. I then cut the remaining 5 holes with the bi metal blade so it wasn’t because the steel was too hard.

worked well on plastic hobby box - clean cut, no shattering around hole

Muy bueno

I was skeptical about these by how cheap they are, but it works great. I even decided to buy the 5 pack afterwards.

In a previous post, numbers were inverted. And I had given only a 3 star for this product. I am sorry for the misinformation. This product is fine and we are using it. It came in on time as stated in the order section. Again, I am sorry for the mix up.

EDIT: After using a better drill bit and Blue Loctite on set screw,, the hole saw worked fine. Bumped it up to 3 stars and overall, disappointed but made it work. Drill bit did not center properly and even broke on a test piece. Will update after I use a different bit and am able to complete an actual cut. This is currently being used on aluminum, 1/2 thick.

Bought two, and both drill oversized. One drills 0.20 oversized and the second drills 0.30 oversized. If you are drilling say a bolt hole, it’s a really sloppy fit. The quality of build was fine, but the accuracy wasn’t.

Awsome holesaw need a very powerful drill and a strong grip and lots of oil