These types of straps are outside serrated straps, which have a smooth surface on the side of the wires to prevent damage to the insulation. The wide width of the strap additionally minimizes the possibility of damage. The PE/RPE strap group has EDF approval. The low profile of the head allows for use in tight spaces. RP straps are detachable and can be reattached. The straps were designed for use in power plants. However, due to the unique design of their head, they can be used in hard-to-reach areas. Additionally, they can be used outdoors as they are made of UV-resistant polyamide.