EZARC Carbide Hole Saw Kit, 3 Piece Carbide Tipped Hole Cutter with Pilot Drill bit for Hard Metal, Stainless Steel, Iron, Aluminum, Alloy

Best hole saws I have ever bought, extremely durable last a long time always (use oil when drilling) really affordable.

This worked for making extra holes in an 18g stainless steel sink. I drilled 4 holes total of 1 3/8" size (standard hole size for kitchen faucets & items). First, I made a circle wall of plumbers putty around the area to hold oil (can also use clay), put some motor oil in the circle since I didn't have any cutting oil. It worked well, I had to angle it slightly left and right as I drilled down to get it to cut through but it made nice clean holes. Oil is a must to keep the bit cool so it will last longer and cut properly, put some paper towels under sink to catch the oil when you drill through. I also made a small 1/8" pilot hole with a different drill bit as a guide for the main 1 3/8" bit, as it will keep the main bit drill bit from wearing out. New Cut-out is very sharp, recommend filing the new hole with a half round file to remove all sharp edges/burrs (file both sides top and bottom of hole). It will prevent you from getting cut while handling, and also prevents any rubber washers and such on new faucets/ air gaps, etc., from being sliced/cut by the too sharp edges and burrs of the new hole. I don't know how long this drill bit will last, but I got 4 holes so far and it looks good enough to cut more.

I haven't needed to use my set yet due to a job change but I used my coworker's many times and they are fantastic. We worked almost entirely with stainless steel and in 2 years he never needed to replace his. What I'd like to add is that when I received my kit one tooth of the 2" saw was chipped. I emailed EZARC and they responded the following day; the replacement saw was in my mail box 3 days later. Amazing customer service.

They are well built and operated very well through 1/4"-5/16" steel

sharp and works if used correctly

These dudes hog through 1/2" stainless steel many times with ease, remember to use plenty of cutting oil.

These are the only holesaws I like to supply my team, they are sharp and last long. No problem with stainless steel. No over priced compared to other big name brands

I needed to drill out a few discs of stainless steel from 1/8" plate and hss steel hole saw wasn't making a dent. This saw on the other hand sliced through with ease. I bought this set along with a single 54mm equivalent. I'm impressed with the machining and operability of this line and will be my go-to choice for punching holes in metal sheet & plate going forward, at least until I do something crazy like buy a plasma CNC system. :)