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

Bought 2 different sizes and extra bit pack. Complete waste of time and $$. I am experienced tool and craftsman, this is worst cutting product i have seen all my life. The center drill bit is so brittle it breaks immediately with little to no cutting pressure at all. Bad, Bad Bad!!!

this saw cuts so fast and clean I was worried but took a chance on it and am glad I did I will be buying another size today

This product is very good!! Cuts better then I expected!

I bought the 1 7/8 inch carbide hole saw. I needed to drill through a 3/16 steel bumper on the back of the jeep. No problem at all. It worked great. I did use oil as it cut through the steel.

Drilling one hole at 100 rpm in 1/4 304 stainless. Drill shaft broke before hole was finished.

Le facilita hacer el trabajo

Drilling through the sheetmetal floor of my van tore the teeth right off this hole saw. Toothless, it failed to finish the first job I gave it, and then I toss it in the trash. Money wasted.

Pilot bit broke halfway through the single hole I needed to drill in my new stainless steel sink. Couldn’t find a perfect size replacement bit at local home store, so hole ended up wobbling and being wallowed out. Luckily what I was putting in (glass rinser) covered the oversized hole.

So i wondered why they give you two guide drills (that go in the center of the hole saw and guide it straight as you drill/cut because without it the hole saw would wander all over the place). Well mine broke the first guide drill within a second of starting the hole. And that was with minimum pressure as I am always cautious to start and add load slowly. The second drill bit went just as fast. I put a dewalt drill bit in there and that did not break so.... needs work I would say. After getting far enough for the hole saw to engage with the aluminum (1/4 inch, fairly soft Al plate) it chattered and tried to wander but the dewalt bit held. Still it didnt cut straight and instead gouged out an elliptical hole. Slowly. With a tremendous amount of noise. Now as you machinists know, aluminum has a high cutting speed and both steel and carbide bits will cut it cleanly but I hesitated to ramp up the speed much more as I didnt trust this bit not to come apart. Maybe I can save it for use on wood. I definitely would not recommend this hole saw for even soft metals like aluminum and brass. If I had an end mill this large i would have used that instead. So, maybe good for wood, not anything harder and the guide drills are not to be relied upon. Update: Seller has offered a refund but thats not important to me. I did take the bit to a friends machine shop and we put it in a 3 jaw chuck on a milling machine for the hell of it and fed it by hand and it did cut aluminum plate ( no guide drill required) without visible damage to the carbide cutting bits so I guess this qualifies redemption of sorts. When it cant wander it does cut so keep that in mind.

Worked perfect on 1/4” S/S plate. Fabricated a base plate for a swimming pool ladder.