Bevel Type
The simple type, ST_BevelPresetType, defines a preset bevel for a shape and some examples can be seen in figure 3.

Figure 9: Different bevel types applied to a shape
The different types of bevels available are:
relaxedInset<>circle<>slope<>cross<>angle<>softRound
convex<>coolSlant<>divot<>riblet<>hardedge<>artDeco