Unique Self-locking Mechanism: When unfolded, the 4-section folded part only needs to be aligned with the interface, the walking cane can be automatically locked in place. It folds easily when retracted and can be shortened to 11 inches in length, which fits most backpacks and suitcases. Adjustable Height: The walking cane adjusts its heights from 33.5 to 37 inches.Designed to fit the heights of virtually anyone out there.