Recoil inserts are the quick & easy way to repair damaged threads or creating stronger original threads in alloys & composite materials in original equipment manufacture. Made from corrosion resistant stainless steel, they create stronger threads in most materials & simplifiy changeover from unified to metric or vice versa. Recoil thread repair kits contain a quality HSS tap, Installation tool, precision stainless steel inserts & instructions. Supplied in a sturdy container.