Achieve superior stability and grip with Peak Design Tripods when shooting on slippery or loose terrain. Ideal for shooting on ice, smooth rocks, and loose dirt or gravel. Also great when using heavier photo or video rigs in any outdoor setting. Simply remove the standard rubber feet on the bottom of our tripod and attach these 3 spike feet. Mounts using 3 4mm hex-drive screws. Hex tool is included with all tripods, and an additional tools is included with each Spike Feet Set. Sizes available for every Peak Design Tripod:- Travel Tripod (Carbon Fiber and Aluminum)- Pro Lite Tripod- Pro / Pro Tall Tripods