Top Plaza 1x Watch Case Opener Adjustable Wrench Tool, Watch Back Cover Opener Remover Repair Kit Imported Jaw distance adjustable from 8mm to 57mm (0.31- 2.24 inches) Size: 70*40mm (2.76*1.58 inches) Material: the blue zoom is made from alloy; legs - steel. Simple to Use and Fully Adjustable.Suitable for open Back case on Most Watches. Package comes with a velvet pouch printed with the brand logo "Top Plaza" starting Dec 16, 2015.