These metal flat brackets are very strong and hard-wearing, making them suitable for all types of shelves, but are particularly suitable for wood, rustic, and scaffolding shelves. L-shaped corner brackets are ideal for supporting scaffolding slab racks like concrete, brickwork, and other masonry on sturdy walls, simply drill into the wall, secure the bracket to the wall with the screws provided, and then plug the shelf in place and screw it in to secure.