Queentools 12 Dies_watchrepair Queentools Watch Press Set Watch Back Press Watch Back Case Closer, Comes with 12 Dies Dies Snap ON and Off Quickly and Easily,(Blue) Sturdy and easy to use metal press ABS dies wont scratch or mark the watch This dies snap on and off quickly and easily Comes with 12 sizes of dies: 50/48 46/44 42/40 38/36 34/33 32/31 30/28 26/24 23/21 20/18 5. An essential product for watchmakers and DIY