LEKI Sierra SAS Walking Staff Wood Knob / Foam grip / Camera Mount: comfortable foam grip; wooden knob unscrews to expose standard 1/4-20 thread camera mount. Nylon strap with buckle strap adjustment for support. Super Lock System (SLS): the strongest internal pole locking system available as tested and certified by TUV (International Compliance Management); secure adjustment hold with the least amount of torque (hand strength required) offers secure, reliable support; up to 6x more secure than other locking systems. Soft Antishock System - Lite: No ON/OFF function necessary because the spring pitch is limited to 10mm. The size of the shock system is reduced by 50mm and the weight is lowered by 20%. Carbide Flextips: concave, cylindrical tips offer secure hold on all terrain and surfaces; Carbide is extremely hard and durable; entire tip ferrule (Flextip) is replaceable. Rubber Tip Attachment: easily attaches / removes from carbide Flextip; meant for use indoors or on pavement only. Remove tip to expose carbide while on trails.