The efficiency of Carbo Ratchets allows for easier handling of loaded lines, providing a balance between holding power and controlled easing. The Harken 40mm Triple Ratchet Block Swivel, Becket, Cam Cleat Part No. 2613 has a sheave diameter of 40 mm (1 9/16 in) and can accommodate maximum line diameters of 5 mm (3/16 in). With a maximum working load of 408 kg (900 lb), it is a reliable and essential choice for any sailor.