The stainless steel replacement foot spikes can be screwed into the threaded 3/8"-16 holes at the ends of the tripod legs. These foot spikes allow the tripod leg dig deep into soft surfaces of the terrain to establish a stable footing with the ground while shooting on softer, looser terrain. The universal 3/8"-16 stud at the top allows you to use them with any brand that uses the standard 3/8"-16 thread. Compatible with Andoer, Benro, Gitzo, Induro, Kingjoy, Manfrotto, Weifeng, RRS, or any standard 3/8 inch threaded tripod foot and/or monopod foot. They're an ideal way to keep your tripod stable while shooting on softer, looser ground such as snow, sand, soft earth, gravel, and other loose surfaces. They're also useful on carpeting. Tighten the spike foot into place by using a wrench (not included). Work load: 6-10 kg Material: Stainless Steel Weight: ~ 13g per piece Diameter: ~ 12mm Total length: ~ 33mm Contents: 3x Stainless Steel Foot Spike