Its over wire for mid-fence tensioning, increases the effectiveness of the strain by pulling in both directions. No need to cut the fence wire so power in the fence is maintained. The tensioner can also be used to repair a broken wire. Strong, lightweight and made from rust resistant aluminium Easy tensioning and release of fence wire Maintains uninterrupted power to the fence Also used to repair broken wires Hard-wearing and rust resistant 10 year product warranty Its over wire for mid-fence tensioning, increases the effectiveness of the strain by pulling in both directions. No need to cut the fence wire so power in the fence is maintained.The tensioner can also be used to repair a broken wire. Strong, lightweight and made from rust resistant aluminium Easy tensioning and release of fence wire Maintains uninterrupted power to the fence Also used to repair broken wires Hard-wearing and rust resistant 10 year product warranty