Suited for installations in cramped spaces or junction boxes, Ha-VIS preLink® is based on terminal block that user wires separately, then snaps securely into any one of 7 mating profiles: RJ45, PushPull RJ45, M12 D-coded, M12 X-coded, RJ45 HARTING Industrial Form Factor, RJ45 Keystone, and preLink® extender. Wires are inserted into termination block according to color codes, and special preLink® crimping tool ensures wires are always assembled precisely and correctly.