Shell of medium size, solid, with a largely flaring outer lip, body whorl somewhat squarish in appearance because of the knobbed angulated shoulder and the second row of nodules between the shoulder and the siphonal canal.

Shell dull. Spire with 9 whorls plus final whorl. Protoconch very small, about 2.5 whorls, glossy and smooth. Postnuclear whorls decorated with spiral threads leading to spiral lines on later ones. Distinct axial ribbing generally occurs on later whorls; knobbed on the shoulder.

Columella with heavy callus, white and shiny, in old specimens with a silver gloss at the outer edge of the callus. Inside of lip thickened, white and with a silver gloss in old specimens. Inside of aperture white with numerous lirae leading deep into the mouth. In the mouth, the lirae get a brown colour.