we have various metal fence tightener for option.

103.01  PBT insulated Rachet metal fence tightener.
103.02 PBT insulated tape rail metal fence tightener
103.03 Rotostrainer
103.04 wire ratchet metal fence tightener
103.05 porcelain insulated ratchet metal fence tightener
103.06 porcelain insulated wire metal fence tightener