Malco HSW97 Vent Saw - 6 1/4 in. for Cutting Wood and Siding

Very sharp teeth, hold up in heavy cutting through multiple layers of siding, horsehair plaster and lath. I have little doubt that multiple holes would destroy the blade, but since I had one messy hole to make, it sure made it a breeze.

worked like a charm. very heavy duty and sharp. Only used for sheetrock so far but did perfect job.

Very good tool for light installation

Works pretty good but seemed to not cut as good after about 10 cuts so I'm not sure if it is dull already I'm just cutting through chip board with it

Cut a great hold for my JL 7.7 speakers on the boat.Keep rpm's up with a firm grip but be ready to let go if it really catches.

Great for installing my JL speakers

I bought the Malco Vent Saw to install a 6" duct pipe through an outside wall. The first time I used it the drill bit broke. I called Malco, but they do not sell direct to the consumer. Malco tells me that I need to go to a hardware store and have them order the drill bit for me. I bought this online through Amazon.com, and so far have not been able to determine how to get any warranty honored or to find a replacement drill. I would not recommend this product.

The seeming advantage of the Malco design is that you can buy just the replacement blades and they have both a hacksaw type and a carbide grit type so you can cut wood or plaster with them by changing the blade. In reality they both cut slower than hole cutters designed for wood or plaster and they have a very limited cutting depth. I have to cut through multiple layers of siding over plywood or stucco over plywood or even sheetrock laid over plaster and the cutting depth of the Malco hole cutter is not enough.Check your drill manual before you buy a hole saw this large. Only the largest stud drills can manage a 6" hole saw in wood. Whenever possible I now use one of the big slot types of hole saws like the Milwaukee Big Hawg for wood of the Blue Boar tungsten carbide hole cutters. These are more efficient and I can cut 6-1/4" holes with a cordless drill and not deal with an extension cord.