mont-bell ALPINE POLE ANTI SHOCK Purchased about 10 years ago and used once, then stored in a closet at home. The anti-shock system (built-in spring) absorbs the impact when the pole hits the ground, reducing strain on the arms and shoulders. The length can be quickly adjusted from a storage size of 62cm to a usage size of 105-130cm. Assembly and storage can be done quickly. This is a set of 2 poles. Please take a close look at the photos before purchasing.