Stainless Steel 316/304. Strong and sturdy, perfect for indoor and outdoor use, such as glass deck rail, glass deck railing, swimming pool rail, etc. Compatible with 3/8″ or 1/2″ Glass. Size 2.17” x 2.17” x 1.12” (55mm x 55mm x 27mm). Compatible for 3/8″ (10 mm) or 1/2″ (12 mm) thickness of glass. Package include:Glass Clamps/Security Pins/1/2″ Glass Gaskets/3/8″ Glass Gaskets/Security Plates. Installation screws not included. Need to buy separately. Easy to install. You only need a large screw with a large head to connect the flat column and glass. Safe. The Rubber Gasket can secure the glass stably and safely. Perfect for securing glass of Balustrade, Staircase, Handrail, Shelf Brackets for Glass Shelves, heavy duty support brackets, deck handrail bracket, floor bracket for support. Glasses shelf holder, shower shelf bracket, sneeze guard frame, etc.