I don't know what it takes to buy a good soldering iron tip, but this tip can't withstand heat. It burns and oxidizes in no time. If you know how to solder, you can no longer heat the solder or work with the tip. This is the perfect size I was looking for but after only using two of these I decided not to use the others. I know how to start a new tip, so it's not a problem. I tried to find a temperature range where they would work, but nothing saved them from thermal damage. AND ALSO! forget about leaving them on while you reset whatever you're working on. You just can't get back to the top fast enough to save it before it gets damaged. I cannot recommend them and my hunt for the right size without having to buy 5 other tips that I will never use continues. only Sain
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