The Psaltery Bow must be rosined before it can play the strings. Rosin the ends of the hairs first, in short fast strokes, then rosin the full length from end to end. Rotate the rosin cake under the hairs as you drag the bow across. This rotation will maintain a flat surface and prevent a deeply grooved rosin which can damage bow hairs. A properly rosined bow will have rosin powder evenly distributed throughout the hair. Never handle the hair of the bow with your hands. Oils from your skin will leave permanent slick spots that will inhibit retention of the rosin powder. The overall length of the bow is 15 1/4". The length of unsupported hair (draw) is 13 7/8".