Externally toothed cable ties with a smooth inner surface for bundling. Wide contact surface minimizes the risk of damage. Flat head geometry suitable for tight spaces. Parallel looping ensures an improved fit around the bundled goods. Cable ties in the RPE series are releasable. These cable ties were originally developed for use in the energy supply sector to bundle cables easily and safely even in areas with limited space. The special design ensures that there are no sharp edges, thus guaranteeing maximum safety. The cable ties in the RPE series are releasable and can be reused.