Watch Back Case Opening Tool Professional Easy to Use Watch Back Case Opening Tool Description: [Function] Professional watch maintenance tools to meet the requirements for opening the back case of the watch, opening and closing the screw-on case. [High Quality Material] The watch case opener is made of high quality alloy steel, with high hardness, good strength and high strength. [Groove handle size] Including key and 13 groove handles (18.5/20.2/22.5/26.5/28.3/29.5/30.5/31.5/32.5/33.5/34.5/35.5/36.5 mm) [Watch Repair Tool]Great for opening and closing the waterproof back case of your watch. Essential tools for watchmakers and watch repair workers. [Easy Storage and Carrying] The watch case removal tool comes with a storage box for easy storage and portability. Specification: Material: alloy The package includes: 1 key 1 adapter 13 grooved handles