ARB45 - 45 mm Automatic Ratchet Block, Single, Aluminium sheave Halyard shackle These low-weight backstay tensioners are

These low-weight backstay tensioners are simple to use

A "Do-it-yourself" kit based on a ø77 mm carbon spinnaker pole section with Seldén series 534-854 composite end fittings with Dyneema loops for lift and downhaul

Tighten around the deck ring with a hose clip and with adhesive tape around the mast

30 mm x 2500 mm long standard track with holes for M6 fasteners

ARB45 - 45 mm Automatic Ratchet Block, Single, Aluminium sheave Halyard shackle These low-weight backstay tensioners areAPPLICATIONS Dinghy main sheets. Dinghy spinnaker Gennaker sheets TECHNICAL FEATURES The block is designed with lightweight Delrin ball bearings and comes with an aluminium sheave for more grip when using it for a thin line. The sheave automatically changes from free turning to ratchet when the load increases. The sailor decides when the automatic ratchet kicks in. The switch over point is set using an allen key to adjust a screw inside the sheave.