VARIOUS DIES TO FIT YOUR WATCH12 dies double size to allow for 50/48mm 46/44mm 42/40mm 38/36mm 34/33mm 32/31mm 30/28mm 26/24mm 23/21mm 20/18mm.The various sizes make it easy to find the right ones. Please see the video before use. WELL MADEThe press is of metal construction and the assorted disks are hard durable plastic.The arm of the press is spring loaded it keeps the press in the open position.The spring is nice and does not require too much pressure to close it. The handle surface have stripes,non-slip and durable. Snap-on system allows dies to snap on and off quickly. High QualityThe dies are made of ABS plastic, which will not scratch the watch or mar crystals. Good for closing your snap back watch case after repairing job, not for crystal apart, and please make sure to use the correct fitting dies to avoid damaging the watch. CLEANING CLOTHThis watch press kit comes with a cleaning cloth for padding under your watch while press to protect your watch well.