Gemi Elettronica Ratchet electric fence tensioners for wire up to 6mm² and for webbing electric fences, electric fences, electrified fences Easy to use for tensioning conductor wire or webbing Can be installed on any part of the fence, thanks to the simple washer, the wire is set to the right tension in just a few rotations The Gemi Elettronica ratchet tensioner is useful for your electric fence, pasture fencing for horses, ponies, cows, goats, sheep, boars, deer, cattle, etc.