Watch Case Opener Set fits high end watch Oyster Repair Tools This is a new watch case opener & closer. It is designed especially for all high end watch water resistant screwback oyster cases. It accurately interlocks with the knurled edges of genuine high end watch case backs. You receive: One reversible case back remover with a 28.3 mm die on one side and a 29.5 mm die on the other side One reversible case back remover with a 22.5 mm die on one side and a 26.5 mm die on the other side One reversible case back remover with a 18.5 mm die on one side and a 20.2 mm die on the other side 2 Adjustable movement holders Newer versions of the item shown may be shipped, as a result, there may be a slight variation in color and design.