Baer Heli Coil Tap - Wire Thread Insert - Bottoming Tap (STI) - UNF - 1.1/8 x 12The Baer Heli Coil Tap is the go to tool for impeccable thread repairs and reinforcements. Designed for UNF threads and built around the needs of professional shop work, this bottoming tap (STI) ensures clean, accurate tapping every time, so you can install wire thread inserts with confidence. Key features that set this Heli Coil Tap apart: Bottoming tap geometry delivers full depth threads in blind holes, creating a solid foundation for reliable