Works great as a spike, but the "rubber" part and attachment design produce several problems in everyday use. First, the material is closer to hard plastic than rubber so, when in use in hard surfaces, it has limited grip. Second, the attachment thread is very delicate, small scale and placed where the spike will be in the ground, meaning after using the spikes, a long cleaning session is necessary to reattach the "rubber" feet to avoid hiking around with three spikes. Useful for off-road projects but not as a permanent fixture in your tripod.
