2 New Watch Back Openers. This is a new set of 2 case openers. Each has adjustable tempered pins for easy use on water resistant cases. These provide a tight, non-slip grip. Each has long handles for increased pressure. Each one includes a double blade. This is a replacement for the Jaxa wrench. Tips adjust from approximately 9/16" to 1 9/16" (15 mm to 40 mm).