Unit Press GaugeWith 12 dies for 24, 26, 28, 30, 31, 32, 33, 34, 36, 38, 40 and 42. Ideal for watch repair and watch battery replacement .No damage to; the watch Manufactured; made of ABS plastic, the press and the mold will not leave any scratches or marks. In addition, there are metal screw holes between the press and the mould, which makes the installation more convenient and less laboriousHigh quality materialThe mold is made of ABS material, which will not scratch the watch. Twelve shapes from 18 mm to; 50mm are suitable for; most watches. The center of the mold contains metal and will not scratch your watch.Easy to use. UseOnly three steps - choose two suitable molds, screw them together. the press and depress the handle.Repair the watchOpen the back cover of the watch, replace the battery or do other repairs, then press the back cover of the watch with the watch cover.