Have the part in tough daily use by 6 colleagues (up to 25x to draw daily on the thread). Once lost ID card, because the push-button failed, the thread pull-out after 6 months is fuzzy ud tears after about 9 months in the other. Stop is a consumable item. Length of thread is sufficient for an outstretched arm, when the part is attached to the belt loop of his pants. Quite acceptable price-performance ratio. Extremely fast delivery.