Solderless RJ45 to terminal block adapters provide a reusable connection solution resulting in a simple and convenient method of connecting products or devices wih different types of signals over inexpensive UTP Cat5e, Cat 6 cable without the use of tedeous RJ45 connectors or crimping tool. If you need to change or modify your installation for use with different signals, no problem simply change the wiring with a small slotted screw driver, no additional connectors are necessary. Labeled terminal blocks 1-8 positions, Accepts 22 to 24 AWG wire. Includes Rubber Strain Relief and Cable Tie.Calrad Electronics