Rated 4.5 out of 5 by 29
Rated 5.0 out of 5.0 by Patrick Works exactly as advertised, easy to learn to use
I bought this to locate electrical boxes behind 5/8" drywall, and it works extremely well.
A couple of things:
1. If you're using the typical plastic nail-on new work boxes, remove the little plastic spacers from the side of the box against the stud with a pair of pliers or a razor knife. Otherwise, you have to cut out quite a bit wider or risk blowing out the drywall on the stud-side of the box.
2. I found using a pencil rather than a sharpie made it easy to follow the line accurately.
3. I used an oscillating multi-tool with a Dremel drywall jab-saw blade. This worked very well. It's loud, and cuts a lot slower than a rotozip, but it won't get away from you. I found it best to try to cut the hole tight, pry the piece out and see where the box sits. I had to enlarge a couple of holes slightly before the drywall would fit around the box. Better too small than too big, you can always cut out more. Just don't push on the sheet until you pry the piece out and see how accurate your cut was.
4. Obviously, if you hang sheetrock for a living, you probably can find the boxes and cut them out with a rotozip in your sleep, without using this tool. However, this tool is great for someone starting out or who occasionally hangs drywall.
After cutting a few holes, probably too large, you'll get a good feeling as to where to cut in relation to your pencil line. After the first few boxes, I was cutting extremely tight holes without even trying. I've attached a photo of the last one I cut it, nice and close.
December 22, 2013
Rated 3.0 out of 5.0 by wilbur Looks like a good product
Have not got a chance to use this yet but I've seen it demonstrated on line. Need all the help I can get when it comes to boxes in the walls and not making a mess of things.
May 13, 2015
Rated 5.0 out of 5.0 by Slammer1 Really like the locating kit.
I experimented on a scrape piece and then tried it on a small section while moving a wall plug. Worked great and I feel comfortable using the tool kit on larger projects.
April 21, 2015
Rated 5.0 out of 5.0 by CarolofHabitat Easy drywall marking and cut-outs
In the past year and a half, I have used the BlindMark and ArcMark products in helping to build nine Habitat for Humanity homes. That's a total of more than 1000 cut-outs for electrical boxes, vents, and lights, so I have some expertise in this area. Before using the BlindMark products, the crew would often cut the electrical wires stuffed in the boxes (using the "stab the saw in the middle of where you think the box is" technique), or it would be a laborious project of measuring, marking and cutting just to find out that the hole wasn't exactly where you wanted it! Since switching to using the BlindMark magnet, EVERY hole is perfect, there have not been any cut wires, no forgotten boxes, and our speed has picked up. No more box measuring, just a mark on the floor for each stud location and a ">" or "<" showing what side of the stud a box is on. After the drywall sheet is loosely tacked in place, each box is found and marked using the locator magnet, and then cut-out with a spiral saw using a guide-tip blade to guide around the outside of the box (guide the tool in a counter-clockwise direction for outside cuts!). A knife or keyhole saw could also be used, but the spiral saw is fast and makes a nice clean cut-out. After the holes have been cut, the drywall panel is then pushed all the way to the studs and nailed or screwed. We work on several rooms all at the same time and have found that taping the magnets into the boxes with masking tape is a good idea since hammering on the other side of the wall tends to make the magnets fall out. This is the only "flaw" that I have found with using this method. I highly recommend this product to all drywallers, pro and amateur alike.
February 6, 2007
Rated 5.0 out of 5.0 by yankcat Love it !!
Permanent magnets in these make this a ecofriendly product that works well
ive done about 23 outlet boxes in smartsiding . all were good and you can do gang boxes by putting 1 in each end and connect the lines . very simple
September 16, 2014
Rated 4.0 out of 5.0 by Anonymous Good product.
Works well, but you still have to be careful. You need to have a good idea of where the hole should be, because it is fairly easy to align the magnets so that the bottom magnet in the outlet lines up with the top magnet outside, causing you to cut the hole too low.
September 2, 2014
Rated 4.0 out of 5.0 by cped54 Not used enough for full review but...
the one thing I learned is to mark the floor or above approx where the box is. I didn't do this and one one piece of sheetrock it worked perfectly, but on the other, the magnets caught wrong, meaning the top magnets caught the bottom magnets of the outside piece,and thinking it was lined up I made the cut. This was mostly my error though, just warning others
March 18, 2014
Rated 5.0 out of 5.0 by ulthur It Works
Like many people, I did not think this gadget would work, but I have wall board to go over 22 electric boxes. So I tried it, and it is unbelievably good. A fantastic gadget!
June 12, 2010