First you should be aware that such a device only partially can be accurately show the desired display of drilling problems in a wall. Here it should be noted it is not possible to know how deeply plugged into the wall, the cable or pipe is still the device the place to the centimeter exactly at. However, it is a good help to the area where it indicates something to be avoided, thus avoiding substantial consequential damages, so the instrument can very well! and for the price it is therefore highly recommended.
