Unique, adjustable spreading board is unmatched in ease of use and versatility. Angled pinning surfaces are select balsa, 2-1/2″ (6.6cm) wide x 1/4″ (.64cm) thick, fastened internally to a sturdy, vacuum-formed plastic base. The base is cemented to a rigid hardboard floor to avoid warping, provide rigidity and resistance to pressure. A plastazote foam strip, 3/8″ (.95cm) thick, is inserted in the center pinning groove, which is adjustable from 0″ to 3/4″ (1.9cm). Width is changed by pushing the balsa strips across the smooth surfaces to the desired width. Adjusting screws increase or decrease resistance as needed, or lock width into permanent position. Balsa pinning strips are resurfaced by wiping with wet, soapy sponge to close pin holes, then sanding with fine paper when dry. Overall length is 14-1/2″ (36.8 cm); overall width is 5″ (17.2 cm).