Calculated Industries 8105 Blind Mark Drywall Electrical Box Locator Tool

I just used it to drywall my friend's basement and we are both impressed. I am a general contractor but I'm not drywalling everyday and I am not a big fan of Rotozip as they make a lot of dust, can cut through vapour barrier and risky for novice. I think this kit is a great tool for professional and occasional DIY'ers alike. It definitely makes life easier but I would suggest taking quick rough measurements and marking them on the drywall before you use this kit and start cutting because its always good to check your work in multiple ways to narrow down margin of error. This is a great kit that can speed things up but it definitely helps to be careful. I recommend taking the approach of using this kit for a better visual and to verify your rough measurements before cutting. I also started by cutting the hole much smaller than the outline at first and then cut outwards carefully to avoid over cutting and that helped me avoid error.

Works well, however is designed for non metal electrical boxes, i suggest for the manufacturer to introduce a Combo version or at least some sort of marking to guide the size to acomodate metallic boxes, I improvised the short coming with a marker but it should not be so.

I used this item for a basement renovation. It's a great product, but there are 2 issues with it that prevent me from giving it full marks. I think another buyer mentioned the first big issue is that the box template seems 1/2 inch bigger along the bottom of the electrical box if you cut out the template. I learned to cut the bottom shorter to get a perfect fit. The second problem is you can't use this item with full outlets. You have to take out the outlet first before using this tool which doesn't make it as useful for jobs that have electrical already completed.

Very simple product that does its job.Make sure the finder magnet is right on top of the box magnet,you can wiggle it a bit to feel the strength of the connection.There be probably a few mm play to it but that ok the outlet cover will hide it.When cutting the drywall make sure to cut it a tad on the outer marked outline not on the line itself so you can fit it over the box.

These looked great and would be a handy addition if your putting up your own drywall/gyprock in the USA. I got them but they do not fit the AU/NZ size standard size wall plates. I returned them with no issues. Bummer! The magnets seemed pretty strong to me.