The Simply45™ S45-B003 is an 8.5mm (0.33") snagless strain relief for use with larger diameter shielded LAN cables. The S45-B003 is recommended for all Simply45™ brand shielded with external ground RJ45 modular plugs. These 8.5mm strain reliefs protect the RJ45 modular plug and extend the useful life of the termination. Simply45™ recommends that strain reliefs or boots should be used with all RJ45 terminations.