C.R. LAURENCE Z812BN CRL Brushed Nickel Z-Series Square Type Flat Base Zinc Clamp for 1/2" Glass For 1/2&quot; (12 mm) Glass Thickness Replacement Gaskets are Available by Ordering Cat. No. Z12SG For Use on Mezzanines, Partitions, Railings and Windbreaks Use Monolithic Tempered Glass Steel Pin Available for Additional Glass Support