If the back cover is too tight, you need to use a wrench type opener, and then use the opener ball. Repair Tool: Watch case open ball is a fun watch case opener tool that looks like a toy ball, but a professional watch repair tool.
Watch Case Opener Ball 7cm Blue Rubber Friction Ball Repair Tool Portable
If the back cover is too tight, you need to use a wrench type opener, and then use the opener ball. Repair Tool: Watch case open ball is a fun watch case opener tool that looks like a toy ball, but a professional watch repair tool.