HEAVY-DUTY FLOATING SHELF BRACKET - Upgraded strength & thickness to 12mm solid carbon steel bar and 4mm back plate. EASY INSTALLATION (FULL KIT INCLUDED - SHELVES NOT INCLUDED) - To make sure every DIYer can easily start with, we include 2 types of wall plugs and screws that can be applied on different types of walls like Stud, Drywall, Concrete & Masonry walls.