Baer Heli Coil Tap - Wire Thread Insert - Bottoming Tap (STI) - Metric - M22 x 1.5Baer Heli Coil Tap Wire Thread Insert Bottoming Tap (STI) Metric M22 x 1. 5 The Baer Heli Coil Tap is the precise, high performance tool you turn to when you need reliable, repair grade threads for Heli Coil wire thread inserts. Engineered for durability and designed to deliver clean, repeatable results, this bottoming tap creates full depth threads that ensure the insert seats perfectly and stays locked in under load. Key advantages that set this tap