Processing super! As just always at Proxxon. It is much gentler to use this Raduttereinsatz for deep lug nuts, but small scratches from the rotation (when using a Schlagschruabers) occur anyway. But these are minor and can not be compared with a herrkömmlichen nut. My tip, if the lug nuts are deep a must, but if the nuts are together under a cap (as in our VW rims) and not deep in the rim, then the stakes are nice-to-have.