The Leofoto TFS 3/8 Long Spike/Rubber Foot Set comes with three long spikes with rubber end caps. The rubber end caps are used for indoor environments and may be removed for outdoor terrain. A rubber washer on the top of each spike ensures secure support for your tripod legs. Each claw features a 3/8″ mounting screw and can be attached to the bottom of tripod legs that have a 3/8″ thread for tripod feet.