The Petzl Partner is a really light and really compact rope pulley made of aluminum. Thanks to the pulley with encapsulated ball bearing, it has a high efficiency of 91 percent, and the side parts are movable for quick and easy installation. You can use the Partner with rope diameters of seven to eleven millimetres. With the Petzl Partner, you always have someone at your side to watch your back - or at least to handlebar the rope in the right direction.