Carr Lane Key Inserts are ideal for thread reinforcement, especially when the mating stud or bolt will be removed frequently. These key-locking threaded inserts provide strong, permanent steel threads in a weaker parent material – ferrous, non-ferrous, or non-metallic. Key Inserts are also well suited for quick repair of stripped, damaged, or worn threads. A solid version of threaded inserts is also available to use as a handy plug to relocate holes drilled or tapped in the wrong location, now in India.