I needed a stud finder to mount my new TV on the wall and it was perfect. Not only did I discover that I had custom rivets that were much thinner than regular rivets, I also told myself that where I was going to mount the TV there were live wires. It would be very dangerous not to use it because I might get electrocuted and my TV would fall. From now on, even if I hang a small picture, I will use this thorn finder. I recommend everyone to buy it mainly because it has the best features.