LEKI Trail Tour COR-TEC Antishock Poles (Pair) Expander locking system offers quick, easy-length adjustment and a secure hold Integrated anti-shock spring cushions your pole plants on hard surfaces Carbide Flextips are concave, cylindrical tips that provide a secure hold Spring has three settings to customize your level of comfort When Nordic walking off-road on all terrain and surfaces; carbide is extremely durable while the entire tip is replaceable