What is common between a eukaryotic and prokaryotic flagella?

The common feature between eukaryotic and prokaryotic flagella is that both are used for locomotion. Prokaryotic flagellum is single stranded while eukaryotic flagellum is 11-stranded. Eukaryotic flagellum has two parts, basal body and shaft, while prokaryotic flagellum consists of three parts, basal body, hook and filament. Prokaryotic and eukaryotic flagellum are made up of flagellin and tubulin proteins, respectively.