The StudBuddy is the world's simplest stud finder. Utilizing super-strong magnets, The StudBuddy sticks to the screw or nail heads used in hanging drywall to wall studs. Simply drag The StudBuddy across your wall and watch as it points you to the stud locations. No batteries are required, and we guarantee our product on all drywall applications. The StudBuddy is perfect for hanging shelves, cabinets, televisions and more! Its ergonomic design and plastic construction feels good in your hand and won't mark or scratch your walls. Best of all, The StudBuddy is manufactured in the USA and our company supports Hire Heroes USA and the National Breast Cancer Coalition.