Feature:1. Strong Permeability: Magnifying glass can enlarge the calendar window of the watch better, making the phone maintenance more convenient.2. Optional Size: Various size calendar magnifying glass meet your different requirements, save your time and energy.3. Practical Tools: Magnifying glass parts bring you a good quality experience and an excellent choice for watch repair.4. Time Saving And Labor Saving: The professional tools of watchmakers and watch repairers can save you expensive repair costs.5. Professional Repair Tools: Watch repair tools, used to adjust the balance wheel of the watch movement.Specification:Item Type: Watch Calendar Magnifying GlassModel: 3.5 x 3mm, 4.5 x 3.5mm, 5.8 x 4.5mm, 5.5 x 4.5mm, 6.0 x 4.5mm, 7.0 x 5.5mmPurpose: Watch repair tool, used to adjust balance wheel of watch movement.Package List:6 x Watch Calendar Magnifying Glass