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DOWNLOAD THE INSTRUCTIONS AT www.ftc-tree.com
This is not a tutorial video. They must be used only by trained and expert people.
If you are not able to calculate loads, ropes, vectors... don't use them.
These rings are made thinking to use ropes with bigger diameter, and to use them in different ways.
Here there are some personal suggestion that WILL NOT substitute ftc instructions:
#1 if there are more than one rope running in the internal hole, they don't have to touch each other. Be carefull also when you retrieve the rope from the internal hole, it could raise and scrape violently against the other rope still in the hole
#2 In particular situations the ring could start to turn
#3 In long and fast descends, the ring could overheat
#4 If the "black cover" worn out, the ring will overheat quicker
#5 it's dangerous if the ring is crushed between two pieces of wood (example: trunk and block of wood in double whip set up)
#6 when you use the external groove. dropping a piece of wood from higher, be carefull that the rope could go out from the groove