Supports the boom at all times.  Prevents accidents when the topping lift is incorrectly set or adjusted. Fits all types of mast and boom extrusions.
The kit is supplied complete for the installation as a complement to the existing vang and consists of:
• 2 coated flexible fibreglass rods giving sufficient back pressure to support the boom and mainsail.
• High quality anodised aluminium mast and boom fittings.
• Stainless steel fastenings.
The support does not have any mobile pieces and requires no maintenance. The finishings preserve the sails from damage from friction. 
For boats from 7,5 to 9 mt; pin-to-pin length 118 cm,  rods can be reduced max by 15 cm; max work load 185 kg.