CMI has done it again with this slick little pulley. Has all the great features of the standard micro pulleys, but with two connection holes. This allows for a multitude of advanced attachment possibilities. It also allows you two points of attachment on some of the new saddles with rope bridges. The sideplates swing open to allow placement anywhere on the line. The aluminum cheeks have 7/8" holes for a carabiner. A double lock nut hold everything together on an aluminum axle. The aluminum sheave is 1-1/4" in diameter and held in place by a bronze bushing.