CRL Chrome Traditional 180 Degree Glass Clamp For 5/16" to 1/2" (8 or 12 mm) Thick GlassUsed to Secure Fixed Panels of Glass for Frameless Shower Enclosures Solid BrassA Nice Option to More Traditional U-Channel, in that the Clamps Help the Appearance of an 'All-Glass' Look Glass Fabrication Required to Accommodate Clamps