Sturdy and Durable: The interior of the floating shelf is made of cold-rolled steel and its expansion tube is made of ABS plastic, corrosion resistant, strong, stable and durable Wide Applications: Usually used for DIY or personalized wall shelves, book shelves, hidden in wall panels to save space, can support and fix various wall shelves, such as bookshelves, display racks, bathroom shelves, etc. High Stability: The hidden mounting frame can be installed on wooden products or masonry walls. The support rod is a hexagonal cylinder with expansion tube and spikes, which increases the obstacle to the board and improves stability Load Capacity: The load rod is a hexagonal column , it has plastic tips and housing, which increases resistance very well and does not shake smoothly. The internal metal structure also ensures load-bearing capacity Hidden Shelf Bracket: Used to support custom hidden shelf floats. The exquisite design creates the illusion that your shelf is floating. This allows you to use different designs in the kitchen, living room, bedroom, bathroom or any room you want! Specification: Material: cold rolled steel + ABS plastic Dimensions: Total length: 17.5cm/6.88in Diameter: 1.2cm/0 .47 inch Support bar length: 10cm/3.94inch Diameter: 1cm/0.39inch Color: Brown Package includes: 8 x shelf brackets Installation Steps: 1. Confirm the hole position, drill holes in the wall according to the screw diameter; 2. Insert the expansion rod into the wall opening and turn the adjustment screw clockwise; 3. Confirm the hole position on the board and make the hole according to the diameter and length of the screw; 4. The installation is completed after assembling and fixing the wood hole and wall screw. Warm note: 1. Each board must have at least 2 supports and remain in the same horizontal position. 2. Adjust the drilling length and diameter according to the actual situation.