V Board
From DT Online
V Boards provide a firm base against which work can be held as shapes are cut using either a Fretsaw or Piercing saw.
They are also known as ‘Fretsaw Tables’ or ‘Birdsmouth Boards’.
V Boards are usually supplied with small clamps to fix them to a table edge or they can be made to fix into a bench vice.
They are usually made of Beech