Internal lock and outer lock trekking pole, which one is better?
The internal and external locks of trekking poles have their own advantages.
The outer lock trekking pole is more convenient, and it is locked tightly. But it's not suitable for cold temperatures. It won't lock.
The inner lock trekking pole is a more traditional design, by extruding the thread to expand the swelling bolt to achieve the purpose of positioning. It is relatively firm and stable. However, the disadvantages of this design are: it is difficult to confirm whether it is locked, and the length of the pole is easily affected by the locking force.