Baer Heli Coil Tap - Wire Thread Insert - Bottoming Tap (STI) - BSF - 7/8 x 11Baer Heli Coil Tap Wire Thread Insert Bottoming Tap (STI) BSF 7 8 x 11 The Heli Coil Tap you need for impeccably repaired and reinforced threads. Crafted with purpose built precision, this bottoming tap is designed to cut clean, accurate internal threads that perfectly align with Heli Coil style wire thread inserts. When a hole has lost its grip or stripped threads, this tool becomes the reliable partner you reach for first. Why this tap stands out