Please note that carrying certain knives in public may be subject to legal restrictions:
According to § 42a WaffG, carrying one-handed knives with a lockable blade as well as fixed knives with a blade length exceeding 12 cm in public spaces is generally prohibited. Exceptions apply, among other things, for transport in a sealed container or in case of a legitimate interest (e.g. professional practice, cultural tradition, sport or a generally recognized purpose).
Please inform yourself independently before purchase about the regulations applicable to the respective model as well as any local regulations (e.g. weapon-free zones at train stations or at events).