【How to Use the Watch Cover Remover】 The watch case opener can be used from 19 to 59mm. You can adjust the bit spacing by rolling it to fit the notches of your caseback, and then rotate to open the cover.
High-Quality Watch Repair Set with Adjustable Case Opener – Effortless DIY
Effortless DIY with Adjustable Case Opener. High-Quality Tools: Constructed from 45# carbon steel and CR-V alloy for exceptional durability and break resistance. The case opener is crafted from PP plastic to prevent watch scratches.