Review on 🔧 Helicoil 5528-8: Efficient 0.5-20 Inch Fine Thread Repair Kit by Nick Kirschenmann

This kit is a fine pitch repair kit and requires the use of a prewinder. The spiral insert must be screwed in tightly, otherwise it will not fit into the threaded hole. The supplied Helicoil "pre-roller" is unusable and the instructions are vague. I ended up returning this kit and bought the EZ-Lok inserts which worked great. There are better alternatives when you need to repair a stripped 1/2x20 thread.