C.R. LAURENCE BCU40RB CRL Oil Rubbed Bronze Beveled Hole-in-Glass Style Wall Mount Heavy-Duty Glass Clamp A Nice Option to More Traditional U-Channel, in that the Clamps Help the Appearance of an &#39;All-Glass&#39; Look For 3/8&quot; to 1/2&quot; (10 to 12 mm) Glass Glass Fabrication Required to Accommodate Clamps Solid Brass Used to Secure Fixed Panels of Glass for Frameless Shower Enclosures