Genuine helicoil ,UK made and the original thread repair system.Repairs 7/16 inch UNC (14 tpi) threaded holes in engine blocks,gearbox casings,sterring boxes and axles etc.Kit consists of rethreading tool,insertion tool and six stainless steel inserts (inserts available seperately) Requires a 29/64 inch drill.Instructions are included.The repairs are permanent and strong.
