Description All in one assembly - insulate, strain and connect fence wires. Integrated joint clamp allows direct attachment of wires and power connectionSuperior insulation - insulated body provides 1.7x the insulation of previous models of wire strainersImproved corrosion resistance - insulated body provides added protection from corrosionEasy fence straining - 12 tooth spool for fine adjustment and easy tightening actionEasy set up - spool designed for easy set up and wire alignmentHeavy duty - 1.4x's stronger than previous models, backed up with a 10 year warrantyStreamlined, ergonomic design for comfortable useSuitable for up to 4mm gauge fence wire