cable glands are tools which you can connect to the end of the cable, to safeguard it to the equipment. It also keeps the wires clean, and not all around the place. Such handy tools could be utilized for: electrical power data cables instrumentation control telecommunications It has special projection inside the cap to prevent loosening caused by vibration. Water proof, Dust Proof , Ideal for both Indoor, Outdoor and Marine Pack of 5 pcs sealed