I have just received the goods. I tried this quickly because I had a project where the paint was drying and I didn't want to create dust. I couldn't answer the question of longevity or longevity. However; I was glad to hear that you would send me a screw extractor as a FREE GIFT. I could really use it. BY THE WAY. In your email you said: We know how scary times can be. However, the correct spelling of your message should be LITTLE. You might be able to fix this before posting too much. I had the best English teacher in college. Waiting for extractor. Thank you for being a great seller.