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

Got the job done 8 holes in 3/8 steel plate

Granted it was just aluminum, but I had to cut through some half inch stock. This thing cut like it was butter. No Chatter, grinding, wobbling, binding, smoking, burring, or chipping. I was impressed.

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

Product was as advertised

shafts twisted off because I used a power-full commercial drill press. Use a light duty drill press or by hand & you will be ok. Cuts well.

I’m in construction and have to drill holes in metal studs often. Regular hole saws get hot and don’t stay sharp for very long. This saw is just the opposite last forever, and is twice as fast. It’s a beast.

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.

Cut 4 holes in the floor of a work van, still sharp as new.. Great product

Worked great for cutting perlins to fit around 2 3/8” pipe

I used my 21mm hole saw to drill 16 holes through 3/4” thick steel plate. Eight were set up and drilled on a Bridgeport mill. Eight were drilled by a cordless drill in the field. I did not notice wear or loss of performance at 16 holes. The pilot bit overheated since it drills faster than the hole saw. For thicker material, I recommend through drilling a pilot hole the same diameter, so the pilot bit can act as a guide and not have to work so hard.