cat5e ethernet rj-45 keystone jack cat5 punch-down network white - choose a pack of 5/10/20/30/50 (10) satmaximum cat5e rj45 keystone jack designed for use with a wall-plate for network wiring installs. simply insert the leads in the coloring order you wish and clamp them down. category 5e keystone jacks are 8-position 8-conductor (8p8c) and use the same 110 punch down style that most patch panels use; no switching blades when jumping from keystone jacks to patch panels. the main benefit for keystone couplers is that patch cables can be plugged directly into both sides and require no rear termination, making them an ideal.