In line wire strainer, strong galvanized steel ribbed rust resistant frame holds a tapered die cast aluminum spool designed for ease of starting & wire alignment, 2 extra teeth on spool provide easier wire tightening action & control, requiring less clip turning to hook into next tooth, increased spool hub thickness provides extra strength to accommodate using up to .15748″, 4 mm, gauge fence wire, wire can be threaded through strainer instead of tying an extra knot, high quality spring loaded locking clip, works on high tensile, barb & woven wire.