Tooling is the process of hand chiseling multiple, short grooves into the face of the moulding. It creates a textured appearance that provides definition to a frame edge or panel. To further customize a particular frame, consider adding tooling to a pattern that is usually untooled, leaving tooling off a pattern that is usually tooled, or varying the degree of tooling (light or heavy).
example: 1092 (tooled)
example: 1113 (not tooled)