Stainless Steel Spike
for CT-3371 CT-3471 and CM-1471 Only
　

Weight: 189 g each, 567 g for a set of three. Hardness high, Suitable for concrete surface, asphalt road surface, and all other wilderness ground surfaces such as sand, grassland, and snow.
　

Aluminum Spike
for CT-3371 CT-3471 and CM-1471 Only
　

Weight:  72 g each, 216 g for a set of three.  Hardness low, suitable for wilderness ground surfaces such as sand, grassland, and snow.  Not for use in concrete and asphalt surface.