Stainless steel, available in brushed and mirror finishes, through-bolt threaded structure design with threaded ends for tightening, with rubber gasket in the middle to cushion and protect glass; overall cylindrical shape, approx. 19-25mm diameter. Widely used for installation and fixing of glass signs, mirrors, display boards, acrylic boards, decorative panels, etc., installed by tightening from both sides of glass, stable, reliable and easy to assemble/disassemble, round appearance is simple and elegant with decorative function, a common fixing accessory in advertising decoration and exhibition display industries.