Review on Milwaukee Adjustable Hole Cutter - Model 49-56-0320 by Jon Garcia

I was renovating a house and needed to install about 20 ceiling boxes and speakers. This tool proved to be excellent throughout the project. === Good material ===* It cuts perfect holes in 1/2" thick drywall for 6" lights. I used a brand of commercial lighting from a large orange store. I don't remember which setting I used, but one of the presets matched the template perfectly. Once set up properly, all the holes came out perfectly (except for the one that got stuck in the rafters. Oops).* The plastic screen worked very well - it probably caught 90% of the dust from the drywall. Just have a large trash can ready to throw away before it can fall out. * The blade started to dull towards the 20th hole, but I suspect there are about a dozen holes left in it. I suppose I could sharpen it if I had to * The design is such that you can't accidentally resize the hole without removing the bit from the chuck. The bit actually blocks the slide bars that hold the knives in place. === Not good stuff ===* The maximum hole size was 6.5 inches, which was far too small for the array of ceiling speakers I was planning to install. . Let's get back to the saw.* The tool assembles fairly quickly, although it is difficult to remove from the chuck without disassembling the entire structure. It's not that hard to put back together, but there's always a chance that it will change size. ===Summary===This worked great for my project and withstood all the effort. Not sure if it will hold up to everyday use, but it certainly worked for my needs. Enlarging the hole 1/2" was enough for everything I needed to drill, although it was too small for some speakers. It's virtually impossible to enlarge a hole once it's been cut. I wanted an existing hole expand but without something it was impossible to keep the pilot drill in place. Be prepared for sparks as the blades rub against some particles in the wall plate. It will surprise you when you first see it in my head.