Glass Clamps --- 4 pieces stainless steel glass holders, size 53 x 33 x 20mm/2 x 1.3 x 0.8 inch (H x W x D), suitable for 6-8mm glass, enable it can be installed on square tubes or flat surfaces. Rustproof and Stable --- The glass holders are made of 304 stainless steel, strong and stable, thus rustproof, waterproof and heat resistant, not easy to damage.< /p> Self-adjustable --- Each adjustable glass clamp holder comes with 2 rubber gaskets and a micro adjustment screw to keep stable and ensure a firm grip on the glass. Easy to Install --- -- - Use an M4 hex screwdriver to loosen positions 1 and 2, then insert the glass into the gap, finally fasten the 3 screws with this screwdriver, no drilling is necessary. Safe to Use --- The rubber gasket can be stably and securely attached to the fixture in the glass, ideal for fixing the glass of balustrade, staircase, handrail, window, etc.