Like glaciers and streams, wind erodes in part by abrasion. In dry regions as well as along some beaches, windblown sand will cut and polish exposed rock surfaces. Abrasion is often credited for accomplishments beyond its actual capabilities. Such features as balanced rocks that stand high atop narrow pedestals, and intricate detailing on tall pinnacles, are not the results of abrasion. Sand seldom travels more than a meter above the surface, so the winds sandblasting effect is obviously limited in vertical extent. However, in areas prone to such activity, telephone poles have actually been cut through near their bases. For this reason. Collars may be fitted on the poles to protect them from being "sawed" down.