This is a concave profile wood yo yo turned from Bolivian Rosewood. The string is fitted over a center bearing for smooth action. The turned halves are sanded up to 600 grit with a denatured alcohol wipe between sanding steps. To finish, I apply a light coat of Danish Oil followed by a high speed buffing with a small amount of Carnauba wax. Specifications: Weight: 80 grams Diameter: 59 mm Plating: Chrome Mechanism: sleeve bearing Wood: Bolivian Rosewood