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Review title: Perma-Coil Product by Thread Kits Co.
Product review: The package says " "Perma-Coil" The Other Name in Thread Repair"Do not believe it. I've used Heli-coils successfully to make repairs in cast iron engine heads.I attempted a repair to a cast iron carburetor bolt hole using the Perma-Coil kit.The coils in this kit are poorly made, not wound tight enough to properly fit the 3/8 insert tool and too soft for even a simple job.The tang straightened out after 3 threads time after time. I gave up after the 6th coil.I'll stick with heli-coil products.
