Description: Open watch case backs with ease using this friction ball. Hold the watch in one hand and in the other hand, press the friction ball onto the back of the watch. Start twisting to unscrew the watch back,2.97 inches in diameter(75mm). Inexpensive, easy-to-use and will not leave marks. and you can fill air by the basketball pump yourself if need full air. Specification: Material: Rubber Color Random Size Chart: Diameter Size: Approx. 75 mm / 2.97 inch Package Includes: 1 Piece Watch Case Open Ball Note: Please allow a little size error due to manual measurement. Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the item's color may be slightly different from the pictures. Please understand
