Cylinder seals, worn by the owner on the chest like a pendent, were used to seal jars of provisions or official documents. They were rolled over pieces of clay or mud to produce the impression. The Brussels example belongs to the so-called 'royal' category. It was produced by king Pepy I for the use of an authorized official. In addition to the Horus name and throne name of the pharaoh, the inscription contains the epithet 'one who does what his lord commands', which replaces the official's name.