Versatile, strong and adjustable in-line wire splice that can be used on plain or electric wire and on all types of stock fence. Fits 10-14 gauge smooth wire, including 12 1/2 gauge high tensile, 15 ½ gauge barbed wire and 1/16"-1/8" stranded cable. There are two channels, each with an independent locking mechanism. The "lock" is created by the roller, which is free to move in one direction only and grips the wire as it moves back. This concept allows tension to be applied throughout the life of the wire and can be re-tensioned year after year. Conducts electricity. 880lb max tension limit.