New Wrench Screw Back Watch Opener This is a new wrench watch case opener It opens and closes screw back water resistant watches Includes 12 patterned pins and grips, 4 sets in all, for a variety of case backs This is a replacement for the Jaxa wrench This adjustable case opener can open Fossil waterproof watches It has a maximum capacity of approximately 1 1/2" It measures approximately 5 1/2" (140 mm)