In reply to Snakea: 3 mins a set. using Wooden Metolius finger simulator board and it has reasonable training regime in the paperwork, in that it had me starting from 30 sec dead hangs on jugs with an equal rest period to hang period, the results were good for my increased stamina on longer climbs given that my rest points felt more like rests than scary pauses
Now i am pefecting the right angle hang, which I forget the correct term for, after only 7 months with what I like to refer to as my little climbing wall in the kitchen I am on the smaller of finger holds and reaching 3 sets of 3 mins in a dead hang, but more importantly I feel my locked technique has improved no end.