ASNOMY Tungsten Carbide Tipped Hole Saw Drill Bit for Hard Metal, 4 Inch T.C.T Hole Saw Cutter with 2pcs Titanium-Plated Pilot Drill bit for Metal, Stainless Steel, Iron, Wood, Plastic

I needed to drill through some thick steel. I didn't need that drill bit to drift also. This drill bit was perfect for what I needed. Extra tip, you should really use a smaller drill bit to place a dimple in the metal. Just a small dimple to make sure. After that it just grinded up the metal and made a precise hole. It's really a metal hole saw drill bit. Badass!

These hole saws are really the cat's meow. I have used the cheap hole saws for years and decided to spend a buck and give these a try. WHAT A DIFFERENCE!! No wobble at all and as long as you take your time, they will eat right through the steel that you are boring through (I was cutting through 1/8" mild steel). I now have several sizes and I will not use the cheap-o hole saws anymore. The hole that results is VERY accurate with no sharp edges. I am sure that these hole saws are very durable and will last me more than several years. They come with an extra center drill and spring which is a plus. I am extremely pleased with the speed with which they cut and ease of use.

It cut through my van walls like butter and made nice holes to run cables through. The saw gets very hot, so I took it a little at a time.I recommend pairing this with a Dremel/rotary tool with a metal grinder bit to remove the burrs and sharp edges.

Much heavier duty than the typical holesaw you can buy from Milwaukee or Lennex just don’t run them at too high a speed

It cut a hole in 3/8” steel plate using a drill press. There was a small amount of wabble when the hole saw first started cutting. This may be from the center drill bit not being perfectly centered. Once the holesaw cut into the plate, the vibration was reduced. There was a lot of small metal chips being removed from the steel plate that was being cut. I used a cutting fluid.

I used the 3-1/2” to bore the center of a 6 hole 16” Chevrolet wheel, one bit did three wheels and I purchased another one for the fourth wheel, worked much better than I expected and the finished product looks like factory.

You have to drill slowly when cutting thru thicker material… 2/4 icnch

What a cutting animal!!! Work GREAT, Be careful, it bites hard and pulls on the drill. AAAAAAA++++++