I bought this desoldering tool for my model 808 Hakko soldering iron because I needed a smaller size for some of the components I was desoldering. Desoldering requires different sizes of nozzle inner diameter for the different lead sizes of the components to be solved, in order to avoid underheating or overheating of the part during the removal process. There are several cheaper imitation nozzles on the market that may work for a while but wear out quickly and you need a new one. Hakko makes an