In Gothic architecture , the ribs form the framework of the vaulting . Also see ogive . Also see post and lintel . The riffler is used in delicate shaping and finishing of a carving . Rifflers are made in different shapes and sizes for work in wood, metal , and stone .
Files are generally more finely abrasive than rifflers.
A typical cross is formed by the intersection of two line segments at right angles to each other. An ornamental design composed of undulating foliate vine motif . Also see Art Nouveau . Also see circular saw and crosscut saw . In lost-wax casting , risers are channels through the mold which allow air to escape as molten metal is poured into the mold.