Untitled Document Helical Wire Insert BSF 5/16-22 1.5D PleaseCLICK HERE TO Visit our Shop for a Full Range of Thread Repair Kits Single size British Standard Fine ( BSF) 5/16-22 TPI economic thread repair kit includes: Plain mandrel screwdriver inserting tool High speed steel wire insert tap A quantity of free running inserts (10) Length 1.5D this means the installed length for M8 will be 12mm (Inserts with a different installed length can be supplied if needed, please email for information.) A manual tang break punch The drill is included in the kit All of the replacement wire inserts can be supplied separately these are entirely compatible with all similar systems in use today such as Helicoil and Recoil .