These types of bands are outside serrated bands, which allows the internal surface of the band to remain smooth, preventing any potential damage to the insulation when tightening the bands. The width of the band allows for increased contact surface with the cable, further minimizing the risk of damage. PE/RPE bands are approved by E.D.F. Their special design features a flat profile head, making them suitable for use in tight spaces. RPE bands are expandable and intended for multiple uses. PE/RPE bands are specifically designed for use in the electrical power industry, but are also used in many other fields, particularly in areas with limited space, such as tying hoses or cables in tight shafts or channels. Colored versions are used to secure covers in children's playrooms.