This watch case tool wrench opener is suit for open back case on most watches. A fully adjustable case opening tool. Simple design with thumb screw to adjust diameter. Very convenient and easy to take everywhere and easy to use. Color: As shown in pictures Material: Alloy,Plastic Jaw distance adjustable from 8mm to 57mm Size: Approx.(L*W)7.2 x 4.1cm(2.84*1.61in) Adjustable jaw distance from 0.39inch to 1.97inch (1cm to 5cm) Note: 1. this tool is suitable for the screw cap table, cannot be used in the gland table (that is stuck open unscrew the bayonet table) 2. Please allow 1-5mm error due to manual measurement. 3. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness, pls understand, Thank you. Quantity: 1Pc Watch Case Tool Wrench Opener(Not include the watch)