Peak Design Pro Tripod Spike Feet - Pro Black. 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 Specifications for Peak Design Pro Tripod Spike Feet - Pro: Manufacturer: Peak Design Color: Black Length: 1.4 in Weight: 43 g Features of Peak Design Pro Tripod Spike Feet - Pro Achieve superior stability on slippery or loose terrain Ultra-durable stainless steel 420 construction Quickly install with 4mm hex tool (included with all PD Tripods) Package Contents: Peak Design Pro Tripod Spike Feet - Pro 3x Spike Feet 4mm hex wrench microfiber pouch Peak Design PTA-ST-SF-1: Pro Tripod Spike Feet - Pro Black