This replacement face IS a game-changer for industrial and scientific applications. Made of durable nylon material, it can withstand the toughest materials without scratching surfaces and provides a smooth finish. The versatile design fits perfectly on most industrial hand tools making it a must-have for any work site... However, it may not be as effective for heavier materials harder than nylon itself. Overall, a reliable and efficient tool for any industrial or scientific application..
The original nylon face was unscrewed slightly and used to punch a groove stripping the threads. Be sure to test it before use to make sure it hasn't come loose. The new one is great, just like the old one before the threads broke. If you are a carpenter, take the Thor - 712R Soft And Hard Faced Hammer. I have a wooden handle. I'm sure the plastic pen is good too, but it costs $7 or $8 more.