Matte Black Cooper Door Stop. National Hardware's door stops are designed to prevent a door from damaging a wall or wall moulding. Available in matte black, satin nickel or brushed gold. Instructions and mounting hardware included for installation. Surface-mounted application for easy DIY installation. Prevent a door from opening too widely, add functionality to your space. Finish matched to National Hardware's door hardware line for a clean, modern look. National Hardware's Lifespan Limited Lifetime Warranty.