Ascender (climbing)
（重定向自Jumar）
An ascender is a mechanical device used for ascending on a rope. One such device is a Jumar, named after the two inventors, Jurgen (Ju) and Walter Marti (mar) and their Swiss factory which developed the first tool for sale in 1958. The device's name also leads to the term Jumaring for the process of using such a device. Other terms for this process include ascending, prusiking and jugging.