Case opening dies for the Bergeon 5700 Watch Case Opener. To be used on grooved/oyster ring case backs commonly seen on Rolex watches. Sizes include: 18.5mm, 20.2mm, 22.5mm, 26.5mm, 28.3mm, and 29.5mm. Seven piece set includes six dies and one adapter for attaching to the case opener. 

• Case opening dies for Bergeon 5700
• Eight dies include: 18.5mm, 20.2mm, 22.5mm, 26.5mm, 28.3mm, and 29.5mm (made by Bergeon)
• Two dies include: 34mm and 36.5mm (Made by Horotec)
  
• Grooved/oyster case back openers
• Adapter piece included
• Dies friction onto adapter
• Swiss Made