Features： 1、Rotate the thumb screw to adjust diameter, adjustable jaw distance is from about 8mm to 52mm 2、Can be used to open the back case of most of watches 3、Suitable for watches maintenance or battery replacement 4、A practical hand tool for watchmaker 5、Compact and portable, easy to use Specification： Description: This is a handy tool to remove the back case of watches. Its jaw distance is adjustable, suitable for most of watches. Portable and easy to use, a practical tool to your watch repairing. Features: Rotate the thumb screw to adjust diameter, adjustable jaw distance is from about 8mm to 52mm. Can be used to open the back case of most of watches. Suitable for watches maintenance or battery replacement. A practical hand tool for watchmaker. Compact and portable, easy to use. Specifications: Condition: 100% Brand New Material: Steel Color: Blue (as shown in the picture) Type: Round Tip, Flat Head (Optional) Adjustable Jaw Distance: from 8mm to 52mm Size: approx. 70 x 38 x 10.8mm / 2.76 x 1.50 x 0.43in Weight: approx. 41~46g Package Included: 1 x Adjustable Watch Opener Note: 1. Please allow 0-2cm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Package List：