Splice & crimp tool The UR connectors handle 19 to 26 AWG solid copper wire. Three-port construction is for general splicing or tapping. UY connectors handle 22 to 26 AWG solid copper wire. Two-port construction designed for straight splicing. UG connectors handle 19 to 26 AWG solid copper wire. Allows direct bridging onto an existing wire without pulling slack or interrupting downstream service. Crimping tool has stepped jaws that provide parallel crimping action at the moment of connection.