NOT WORK FOR Sea-Dweller/ Deepsea/ Sky-Dweller and any other larger than 40 mm models. Please measure your watch back case size in advance of purchasing. We disclose the way how to measure in our images, if you don't sure the size, please contact us first. NO.0--18.50mm (0.73 inch) NO.1--20.20mm (0.8 inch) NO.2--22.50mm (0.89 inch) NO.3--26.50mm (1 inch) NO.4--28.30mm (1.11 inch) NO.5--29.50mm (1.16 inch). Apply little of lubricate oil on the die, before use.