The edges of a surfboard are called rails. The shape
of the rails affects the manoeuverability of the
surfboard. Square rails with sharp edges
make the board more "edgy". Rounded rails make the
surfboard more stable. Other parts of surfboards are
fins, the deck, the nose, and the tail. The shapes
of these components all affect how the surfboard
moves through the water, how easily it is to catch a wave, and the size and shapes of waves they are
most suited to riding. Common accessories used
with surfboards are legropes (also known as leashes),
and wax.