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A watch back remover is a best case removal tool for repairing watches or changing batteries, maximum opening 53mm. You could adjust two pins according to the distance of the watch back case grooves and clamp two pins into the watch back case grooves, then rotate the case opener, the watch back case will be removed.
Tips: Difference Between a 2 Pins Watch Back Remover and a 3 Pins Watch Case Opener
It is important for a watchmaker or a watch buyer to get a right tool, such as a case back removal tool if you need to open a waterproof watch case back. There are two common watch back removers, 2 pins watch back remover and 3 pin watch case opener. 2 pins case openers are economical and easy to use which is usually suitable for beginners of watch repair. It can open the smaller diameter watch case back as it has the pocket size. Pin shapes are usually square and round. The 3 pins case opener is the preferred tool for watchmakers because it can grasp tightly the watch case back with 3 pins without slip and scratch, which is easy to open a waterproof case back. The pins of a watch case opener have different shape, including round, half round, curved, flat, square and triangle, which are detachable.