Type:Invisible bracketMaterial:Stainless steelColor: BlackSize: As shownPackage Contents:1 laptop computer Shelf Support Brackets(No Other Accessories) Made of fantastic material, durable and reasonable to use.For installation straight into wooden work or masonty.For the concealed mount ing of shelves (no visible support, does not impact appearance)Height adjustable by way of slots opposed to wall.Angle adjustment via supporting pin which presses at the rear plate when turned in.