Construction

• 1). Drill a small starter hole near the center of one wide side of the 2-by-4-inch board, using the drill and drill bit.
  
  
• 2). Screw the screw eye into the starter hole by hand. Tighten it by hand as far as it will go. Clamp the pliers onto the screw eye and carefully tighten the screw eye a little more.
  
  
• 3). Fasten one end of the metal spring to the screw eye, by bending it around the screw eye using the pliers.
  
  
• 4). Fasten the eye end of the hook and eye turnbuckle to the free end of the spring, again by bending the spring around the eye with the pliers.
  
  
• 5). Support the board at either end with the sawhorses or tables, so that the spring is hanging down from the screw eye.