For 34MM Watch Back Case Opener Screw Wrench Cover Remover Cases Repair Tool Kit

This tool is designed for round screw-back watch cases with a back diameter of approximately 34mm (about 1.34 inches). The adjustable jaw pins typically accommodate cases in the 32–36mm range, but it is optimized for 34mm backs.

No. This is a screw-type wrench designed specifically for cases with notched screw backs. Snap-back and press-fit cases require a different tool — typically a case knife or press opener.

Loosen the adjustment mechanism on the wrench body, reposition the pins to align with the notches on your watch case back, then tighten before applying turning force. Always ensure all pins are seated in the notches before rotating to avoid slipping.

The hardened steel construction provides solid torque transfer for most stuck or corroded screw backs. For extremely seized cases, applying a small amount of penetrating oil around the case back seam and letting it sit before attempting removal can help.

When properly aligned and seated in the notches, the pins apply force only to the designated removal points and should not contact the polished case surface. Using a case holder or vice to stabilize the watch during removal further reduces the risk of slippage.

The adjustable jaw range typically covers approximately 32–36mm case backs. For cases significantly outside this range, a different size wrench would be more appropriate to ensure proper pin engagement and safe removal.

Yes. The knurled grip handle and adjustable pins make this tool manageable for first-time users. We recommend practicing pin alignment on a non-valuable watch first, and always working on a padded surface to protect the watch face.