The Pyramid Holdfast is designed to support 8mm diameter bare solid circular conductors on flat roofs. Manufactured from black weather-resistant plastic and filled with frost-proof concrete. The lip around the base enables the holdfast to be installed onto bitumen type roofs.

用于支撑8mm直径的圆线在屋顶上，其有黑色放风化塑料制成外壳，内填满防冻水泥，通常用于沥青屋面。Material: Plastic filled with Concrete.材料：内填满水泥的塑料