All in one assembly allows you to insulate, strain and connect fence wires. Integrated joint clamp allows direct attachment of wires and power connection. Insulated body provides 1.7x the insulation of previous models of wire strainers. Insulated body provides added protection from corrosion. 12 tooth spool for fine adjustment and easy tightening action. Spool designed for easy set up and wire alignment. 1.4x stronger than previous models, backed up with a 10 year warranty. Streamlined, ergonomic design for comfortable use and suitable for up to 4mm gauge fence wire.