REETAI-FOUR 10Pcs TCT Hole Saw Kit,Tungsten Carbide Tipped Hole Saw Set, Hole Cutter Heavy Duty for Stainless Steel.(5/8-2-1/8”).

Drills bits shattered as they touched cold steal, but the outer cutters remain strong

Like them for drilling big holes quickly in mild steel up to 1 inch thick

Drilled one hole in 304 stainless 16 gauge tubing using the 35mm. It made the hole but no teeth left. Not sure about these bits yet. Update, drilled 18 gauge mild steel.... no teeth, even used oil. On aluminum they make great holes.

Hey I was cutting a 11/16 hole in. A piece of 1/8” Thike metal and it broke

The cutters have worked adequately for the hobbyist projects, but be careful to use the right RPM, pressure and some sort of cutting oil to keep the teeth from overheating. The only complaint is that its hard to tell if the teeth are the same depth or there is a lot of runout relative to the shaft.

NA

First, they come in a plastic box but they wont fit back into the box once you put the drill bit in them. Thats ok because the boxes are brittle and brake up about the 2nd or 3rd time you open them. Second, hole size is not very accurate, about +- 1-1/2mm off. If you need imperial sizes, they are off even more. That said, they drill a very nice hole in 3/8 in. Mild steel. Very nice hole saw kit. I would recommend this set.

Buena calidad

Even if you use oil these scream on a low revolution drill press. they dont seem to bit into the metal very small shavings/chips. The kit itself is nice, spring loaded to push the metal plug out. They work just takes some time.

Okay for the price. Although the description states the 30mm bit is 1-1/8” (1.125”) when actually 30mm is 1.181” which is too large for a trade size 3/4”