Any carpenter, professional or DIY, always confronts the problem of finding studs and other hidden objects (metal or other material) behind a wall. The LED’s used on this new finder can detect multiple studs simultaneously (up to 1-1/2" deep) and identify their width instantly. It’s faster, less error prone and more accurate, and can begin to work at any place on the surface. Its 7" width gives it a “head start” on any other finder on the market, and its spirit level is a real plus. Requires 2 AA batteries (not included).