MMOBIEL Watch Case Back Opener Adjustable Remover Screw Wrench and Watch Case Holder Tool for Battery Replacing and Watch Repair Professional all-in-one kit: Watch Case Opener - Made of superior stainless steel material. This watch case opener works also great on 99% waterproof watches. Adjustable Jaw distance from 11 mm to 56 mm which can fit different size watch cases. It is the most effective tool for watch case opening. Easy to use: Compact Size Simple to use and fully adjustable, Tips adjust from 0.4" to 2.2" (11 mm to 56 mm) great for watchmakers to open watch case and water resistant cases.. The compact size makes it very convenient. Watch case Holder with 4 hard plastic pins. Help watchmaker to fix watches to prevent skidding. Can be set in different positions for different size cases. Product provided by MMOBIEL - We always try our best to exceed your expectations at every turn. Join the ever growing list of satisfied customers and discover the difference with MMOBIEL.