These tips may fit other soldering irons but unfortunately for me the product description says they are compatible with the Weller WLC100 soldering iron which is definitely not the case. - The tip diameter is too large. If you have this iron DO NOT BUY THESE TIPS because you think they will fit and please heed the warnings in these reviews! I wish I could rate them on other hardware, but the WLC100 is the only one I have, so I'm forced to give it the lowest possible rating for patently incorrect product information.