BOXBOLT is a fully tested and approved blind fixing solution for connecting in to a steel cavity, whether it be hollow section steelwork or where access is restricted to one side only. The BOXBOLT cavity fixing is suitable for use with rectangular, square and even circular hollow sections. The BOXBOLT features a hexagon head design to aid installation with a standard spanner but also allows it to be installed with our uniquie BOXSOK installation tool for when installation time needs to be kept to an absolute minimum