Review on High-Quality Heli-Coil 554412 M12 X 1.5 Metric Kit: Quick & Easy Thread Repair Solution by Ben Demers

Did a great job on the seat belt anchor bolt hole in my Trans Am. Installing the liner is the easiest part. It just takes a little diligence to drill a hole. A 31/64 inch drill bit and coolant are a must. Keep the drill straight and remember to clean the hole after drilling and tapping. After assembly, the anchor bolt is tightened as specified!