LEKI Travel Wanderfreund SAS Pole Super Lock System offers a secure adjustment hold with the least amount of torque (hand strength required) to offer secure, reliable support Soft Anti-shock System (SAS) features an internal suspension system that cushions the impact of each pole plant for comfort and security Carbide Flextips are concave, cylindrical tips that provide a secure hold when Nordic walking off-road on all terrain and surfaces; carbide is extremely durable while the entire tip is replaceable. Rubber tip easily attaches and removes from carbide Flextip (designed for use indoors or on pavement only); remove tip to expose carbide while on trails