The operation is intuitive and ergonomic. The Apex features symmetrical side-plates which are optimized for integration with prusik-based progress capture systems. This streamlines system set-up and minimizes the possibility of mis-rigging. The swivel eye on the 1.1″ was designed to accommodate a single carabiners. It is also soft-goods-compatible for situations where you want to eliminate the carabiner altogether Technical Specifications Rope Compatibility Up to 13 mm3 Sigma MBS24 kNWLL6 kNSheave Major Diameter 1.1 inWeight190 gDimensions 4.75 x 2.34 x 1.13 in Certifications NFPA T CEUKCA