The standard for BIS Certification of Cranked-Link Drag Chains of Welded Construction, Attachments and Sprockets is IS 13926:2005, which sets forth the quality, performance, and dependability factors of drag chains for heavy industrial use. This standard outlines the dimensions and materials, construction details, and mechanical properties of cranked-link drag chains and their attachments and sprockets. Heavy-loads and continuous operation, especially under harsh conditions, are characteristic of the cement, sugar, mining, and material handling industries which use these chains. IS 13926:2005 ensures that the drag chains and sprockets have the required durability, wearability, and precision in measurements to efficiently perform and withstand harsh operational conditions for extended periods. In India, manufacturers of cranked-link drag chains and sprockets for industrial use must endorse the BIS standard to sell their products. Users are assured quality, dependability, and consistency in industrial conveying and transmission systems when these products bear the ISI mark and are BIS certified.