Camp Janus Pro Large Double PulleyDesigned for ropes up to 5 8 in (16 mm), this pulley boasts a large wheel and a main attachment hole that can accommodate up to three carabiners. Two secondary holes on the sides and a large becket provide added versatility and ease of use in a variety of applications. Details Efficiency rating of 97% Weighs 425g Maximum breaking load of 42kN Working load limit of 12kN (calculated as 3kN x 2 x 2) Meets EN 12278 standards and is certified accordingly.