The Lindy pack of 20 RJ45 port locks is designed to secure network ports against unauthorized access and accidental damage. Each lock is made of molded plastic and easily fits into the RJ45 port using a special insertion key. Once in place, the lock remains secured until it is removed with the key. These locks also serve as a visual marker to indicate inactive or disconnected ports, making them ideal for schools, offices, and public environments. Package dimensions: 140 mm in length, 135 mm in width, and 10 mm in height. Color: Black. Safety note: these port blockers act as a basic physical and visual deterrent against tampering but cannot prevent a determined attacker from physically accessing an RJ45 port. Warning: the insertion key is only compatible with the corresponding color of the port blocker.