A mooring line thimble with master link is a specialized hardware setup commonly used in the marine and aquaculture industries for secure mooring applications. The addition of the built in Master link allows for a better connection with other components and alignment in component breaking strengths.
Open eye thimble could be G414, DIN6899B, Strong K3 or other type. Master links are normally used U.S. type forged master link or European type welded master link with the working load and breaking load that is fitted into the load data of the whole mooring system.