Petzl Croll Chest Ascender (2012 model)
When used with a chest strap and the ASCENSION or BASIC, the CROLL makes for a simple and efficient system for ascending fixed lines. The angled attachment hole keeps the device properly aligned on the chest. The cam has been refined to increase the efficiency in which the ascender glides on the rope. The wear area has been moved lower on the cams surface to increase its durability. The cam engages without losing a millimeter each time it is weighted and glides smoothly up a rope with a minimal of effort which will be truly appreciated after the first 300 meters of jugging.