I use a pair of K swiss aluiminum adjustables. They are twist lock desighn. They support my weight and supported a friends that is over 100 pounds overweight. They tend not to if you twist your wrist while they are bearing weight as this unlocks them. They cost 9.99 at Farm and fleet and on my last trip to the smokies, there were many leiki users. They could not beleive they were that cheap! They are good poles and I talked to a couple thru hikers that had them. They bought them at backpacking stores and paid 30.00 a piece. I saw same poles in a shop in Estes Park a few weeks ago for 30.00 as well. If you are in mid west go to Farm and Fleet!