LEKI Spin Speedlock Nordic Walking Nordic Trigger grip / strap: LEKI's adjustable Trigger strap offers superior support and the convenience of a releasable system. The strap stays on your hand while you easily click in and out of the grip making it convenient for stretching before heading out on your walk or grabbing a water break Super Lock System (SLS): the strongest pole locking system available as tested by TUV; secure adjustment hold with the least amount of torque (hand strength required) offers secure, reliable support Rubber Fitness tips: specifically designed to provide traction needed for Nordic Walking technique on pavement and smooth surfaces Carbide Flextips: concave, cylindrical tips offer secure hold when Nordic Walking off road, all terrain and surfaces; Carbide is extremely hard and durable; entire tip ferrule (Flextip) is replaceable Strengthen your upper body and create resistance to build better bone density