To penetrate ice, the spike on an ice tool must be sharp, and the joint between spike and shaft must be smooth. Spikes are solid or tubular. Solid spikes consist of a flat plate or a cone-shaped tip, and cone-shaped spikes point either straight down
Fig. 14-5. Side and end views of three adze designs
Fig. ¡4-7. Various ice-tool spike designs or somewhat forward. Most spikes have carabiner holes, which you can clip to as a temporary anchor when setting up a belay anchor (fig. 14-7).
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