Twin Pulley - PETZL The Twin pulley is a high efficiency double pulley (97%). These specific flanges are suitable for the use of Prusik self - locking knots in non - return systems. Large diameter sheaves (51 mm) mounted in parallel on sealed ball bearings to ensure excellent performance, auxiliary attachment point for carrying out different types of hauls, including the most complex. - Can receive up to 3 carabiners to facilitate maneuvers. - To be used on rope diameter 7 to 13 mm. - Working load: 2 x 3 kN x 2= 12 kN. - Weight: 450g. - This product has been manufactured in accordance with the requirements of the EC (EU) 2016/425 regulation for PPE (category 3) according to EN 12278: 2007 standards