RJ45 connector boots is also commonly known as ethernet cable strain relief boots or snagless boots.Strain Relief: They slide onto an ethernet cable (like Cat5e or Cat6) before crimping the RJ45 crystal plug. This relieves physical tension on the cable connector joint, preventing internal wires from snapping. Snag Protection: The plastic hood extension covers the delicate locking clip on the RJ45 plug. This prevents the clip from getting caught, bent, or snapped off when pulling cables through crowded areas, walls, or server racks.