The L-G Waterproof Case Wrench (B) may be made more effective when used in conjunction with L-G Openall Waterproof Case Wrench (C).

By inserting the pin (A) into the shaft of the L-G Openall (C), the case wrench (B) can be held snugly in place when opening screw-on backs other than Rolex. Simply screw down the threaded shaft on the Openall Case Wrench (C) until the pin (A) holds the pins of the wrench (B) snugly into the slots of the watch case back. Then turn the handle of wrench (B). Be sure that erything is properly aligned and that the watch case is held firmly so that it does not slip.