This specialized reference document details the engineering logic behind Ropeblock’s product numbering system. It defines the distinctions between Fast Reeve (FRB) and Standard Reeve (SRB) models and explains how technical attributes—such as sheave tread diameter, wire rope size (mm), and sheave count—are structured within the part number. Additionally, it clarifies the nomenclature for various load-bearing connections, including single hooks (E), ramshorn hooks (D/DB), shackles (S), and oblong eyes (O).