Three 2 Prong Waterproof Case Openers for Opening Watch Cases. This is a new set of three 2 prong waterproof watch case openers. These are great for opening watch cases. They have adjustable tempered pins for easy use on water resistant cases. These are compact size that make them very convenient. This is a replacement for the Jaxa wrench. The tips adjust from 7/16" to 2 1/8" (11 mm to 53 mm). It measures approximately 2 11/16 x 1 1/8 (68 x 28 mm). We work hard to update our descriptions and pictures of our merchandise. As part of a process of ongoing innovation by our suppliers, newer versions of the item shown may be shipped before we are able to complete an update. As a result there may be a slight variation in color and design.