JAY sliding CL attachment is an option to connect the CL and avoid the possible CL unhook as it could happen with a sliding hook. The pulley has a design to avoit full contact of the sides to the steel jaws and guarantee a smooth sliding.This part weights only 35 grams.
When you mount it take care not to lock the pulley by closing too much the ring's jaws when you screw in the threaded pin. Add a drop of Loctite to guarantee screw lock. To unscrew it warm the steel with a lighter to make the Loctite glue elastic.