Review on Time-Sert M12 X 1.50 Oversize Thread Repair Kit - BIG-SERT # 5215 Enhanced for SEO by Rick Alexander

Expensive, but worth the money. All cutting tools in the set are supplied in a protective grid. The drill is of very good quality. The included instructions make installation easy. I used this as a last resort to fix a previous repair of a bad threaded coil spool. The coil winding allowed the insert to unwind along the threads and chew through the bolts.