Why do climbers file their fingers?

Why do climbers file their fingers? Climbers keep their nails trimmed extremely short so as not to catch on the rock and tear. Emery boards or sandpaper are employed, multiple times a day, to file down calluses and prevent them from becoming misshapen or too large. (Read National Geographic’s adventure blog, Beyond the Edge.)

Climbers keep their nails trimmed extremely short so as not to catch on the rock and tear. Emery boards or sandpaper are employed, multiple times a day, to file down calluses and prevent them from becoming misshapen or too large. (Read National Geographic’s adventure blog, Beyond the Edge.)