Roller chain links and connectors are individual links that are added to an existing chain to replace a worn link or to extend the length of the chain. Connecting links, also called master links, are needed when adding or removing links. ANSI standard roller chain links meet ANSI/ASME manufacturing specifications. British standard roller chain links meet manufacturing specifications set by the International Standards Organization metric dimensions (ISO 606), British Standard (BS 228), and DIN 8187. Conveyor roller chain links are designed to transport loads at low to moderate speeds over longer distances and install on an existing conveyor roller chain. Leaf chain links provide higher tensile strength than roller chain links and install on an existing leaf chain.