This friction ball is a great alternative to the standard watch case openerHigh quality and hand feel.Innovation tool, makes you open the watch in an easy, precise, and safe way for any but the most difficult waterproof case backs.It's allows it to fit and evenly grip the surface, giving it more strength yet never scratching your watch. Easy to use; simply squeeze, press, then turn.Perfect for any toolkit whether you're a watchmaker or a hobbyist.colour:Random color(Note: Random color, don't accept the specified color.)Material:rubbersize:Approx. 7 cmPackage Contents:1 * Watch Case Open ballOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.