[Mold size]: Watch press set coming with 12 dies allowing for 50/48mm. 46/44mm. 42/40mm. 38/36mm. 34/33mm. 32/31mm. 30/28mm. 26/24mm. 23/21mm. 20/18mm. Very suitable for repairing many types of watches[Mold quality]: Back case closer uses ABS plastic dies with a metal screw in the middle to make it more durable. and won’t scratch your watch.[Simple maintenance]: Crystal glass closer is easy & quick to fix watch: only three steps-choose two suitable dies. screw them on the press tool. and then press down the handle.[Note]: Good for closing your snap-back watch case after repairing job. not for crystal apart. Note: Before pressing the cover. make sure to use the correct fitting dies to avoid damaging the watch.[Extra accessories]: Watch press tool is equipped with a cleaning cloth for padding under your watch while press to protect your watch well.