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double action
What started out as using whatever was available has developed into a full-blown category of must-have micro pulleys
A whoopie allows the rigger to mount hardware snug against the tree
End-to-End MBS Rating (kN) Basket MBS Rating (kN) 16 29
ZERO BOA Block & Tackle Kit - 30m 4.5 double actionThe Boa kit is primarily used for raising and lowering workers or equipment for work access and rescue situations. The pulleys are equipped with ball bearings for smooth operation, set up with a 4 to 1 ratio, making it easy to operate. The ascender provides a backup lock system in case the operating rope is accidentally released.
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