I use them after crimp on cables for mount cables in power plug with gold coatings. You have to use carefully, because the FP-209 are long and you can have about 0,5 cm of free cable (with inner isolation) to mount them in Furutech IEC power plugs. With longer free cable you can't holding whole cable in plug jaws. There limitation is only for IEC, for Schuko you have more space in power plug.