The Stud Hugger was designed to enable do-it-yourselfers or contractors to install plywood/sheet-rock sheathing on their own. There are no screws or nails involved. After selecting the desired studs simply tap-in each of the Stud Huggers provided. Their built-in lip/shelf will allow easy positioning of the wall sheathing. After the installation of the sheathing, simply tap the lip of each of the Stud Huggers to remove them. The Stud Hugger fits most nominal sized studs, use 2 or more Stud Huggers per sheet.