I have a few pair of hiking poles, some date back to the 1990s. Leki and Komperdell. None have ever failed. My faves are some ultralight poles that REI sold under its brand but were made by Komperdell. I keep a couple old pair in the car.
They've apparently been eclipsed, as products often are, by advances in materials and engineering. Here are some of the latest marvels -- which are shock-corded instead of having locks. A friend used a pair of these in the Alps in September. Problem with them is they can't be adjusted, while I like to shorten poles on steep inclines and lengthen on declines.
http://www.rei.com/product/813391/black-diamond-ultra-distance-z-pole-trekking-poles-pairBy the way,
REI is presently doing 30% off many of these poles and walking staffs. A couple days ago I place an order for this Leki "Wanderfreund Speedlock Walking Staff." I have a history of knee and ankle injuries and keep a similar staff in my car in the event something should happen while away.
http://www.rei.com/product/812554/leki-wanderfreund-speedlock-walking-staffI plan on using this newest walking staff around my neighborhood on dog walks. It can function as and looks much like a cane but also has utility if swung as a baseball bat. There've been a lot of muggings around here lately and off-leash dogs can be an issue.
I have a mean swing.