LEAIGAO Features:Has adjustable hardened pins for easy use on waterproof watches.The watch holder can be set in different positions for different watches of various sizes.Compact size makes it very convenient.An adjustable tool for opening watches.Simple design with a thumb screw to adjust the diameter.Very convenient and easy to take anywhere and easy to use.How to open the lid:1. Measure the diameter/size of the groove on the back of the lid;2. Choose two or three claws whose opening size is larger than the diameter of the back of the lid;3. Loosen counter-clockwise.Specification:Product name: Adjustable Watch OpenerMaterial: Stainless steelColor: Blue (As shown)Size: (Approx.) 70*28*10mmMaximum adjustable width: 60mmOptional type: Round, SquareSuitable for: Opening the back of the watchQuantity: 2 pcsPackage Includes:2 Watch OpenersNote:1. Transition: 1cm=10mm=0.39inch.2. The real color of the item may be slightly different from the pictures shown on the website due to many factors such as the brightness of your monitor and light brightness.3. Please allow slight manual measurement deviation for the data.