CRL Adjustable Square Surface Mount Spigots make installation easier more efficient than ever before with a revolutionary adjustable pressure plate, allowing you to plumb the glass with ease. Simply tighten the top grub screw to lean glass inwards and the bottom grub screw to lean the glass outwards. Adding to the efficiency of installation is the unique two-piece cover plate which enables you to fix the clamp to the ground, find plumb, then install the cover plate without ever having to remove the glass panel. Made of Duplex 2205 stainless steel, they are both stronger and feature better corrosion resistance than 316 grade stainless steel.