Watch Case Back Opener Wrench For Waterproof Watch In A Case This is a new wrench watch case opener ; It opens and closes screw back water resistant watches Adjusts to open screw-on type watch cases ; Includes four pin sets for different case styles Knurled handle with adjustable thumb wheel ; Pin style jaws This adjustable case opener can open Bulova, Rolex, Movado, Gruen, Longines and Accutron screw type back waterproof watches ; It measures approximately 5 1/2" (140 mm) Comes with a storage case;