TheHollow Bolt is a patented method of connect two square, rectangular or circular Fast Frames, or to conventional steelwork where access is available from one side only.The LTFS-11 Hollow Bolt is a tool less connector, used to connect LingTong fast system frame in a 180°angle. The LTFS-11 hollow bolt, as a big hole connector, offers a tremendous reduction in installation time and costs over traditional methods, as well as giving the specifier absolute confidence through guaranteed loads with a built in factor of safety. The length is 125mm and the Width is 35mm.