1 1/2 precision bent steel support with integraded mounting plate. Thoughtfully beveled leading edge to avoid any potentional impacts. These brackets come with left and right handed mounting options to accomodate different stud configurations.  The bottom mount bracket refers to the mounting bracket facing down towards the bottom. 
 
21" deep projection designed to support a 24" deep top
 
Perfect for common area restrooms, reception desks and any other situation where a floating countertop is desired 
 
Mounts to a standard 2x4 wood stud without any blocking
 
Mounts to s standard 3 5/8 steel stud with blocking in the stud void