Hello, thank you for your question. We can not guarantee our tips will work in another manufacturer's iron. It is best to use Hakko tips with Hakko irons. Thank you! -American Hakko Products, Inc
Hi Notesbymelody, Thank you for your interest in American Hakko Products. This particular tip is not a "screw in", it goes over the tip of the heating element on the Hakko Presto soldering Iron. If you have any further questions please let me know. Have a great day!