This product is our choice for a wall cutter.
Ferm's WSM1009 has no less than 1,700 watts of power, which is enough to cut through even the hardest types of stone and concrete. This power allows the grinding wheel to spin at 4,000 RPM unloaded. This way, you can easily cover up cables and pipes. Thanks to the integrated laser, you'll cut straight down. In order to get the best result, it's important to cut down, that is, away from the laser; not up, along the laser line. Of course, you don't just want to be able to cut at 1 width, because some cables or pipes simply are a lot narrower than others. That's why the WSM1009 can handle several different cutting widths. This wall cutter can make gullies of 14, 19, and 29 millimeters wide without any effort. It'll cut them out nice and deep too, because it has a cutting depth of 28 millimeters.