No Measurement is Needed! Avoid time-consuming drywall repairs & spending more money due to errors in outlet measurements. Intended for Single Gang Electrical Box. A must-have electrical tool for electricians & drywallers. Buddy Tools Mark N Guard Drywall Electrical Outlet Locator makes locating electrical boxes easy by marking the center of the electrical box. Buddy Tools aims to create products that will make it easier for DIYers and Beginners to start and do their home improvement projects. Made from high-quality materials to ensure durability and functionality even after long-term use. DIYers & Professionals' new best buddies!