I'm selling this because I no longer need it. Everything is included. A set of back cover opener and fixing base, convenient for battery replacement and repair of wristwatches. The three-point support opener is a screw-back type opener that can also be used for waterproof wristwatches, with an opening width of up to approximately 55mm, allowing it to handle large wristwatches. It comes with 18 interchangeable bits that fit various watches and a watch fixing base, making it convenient for opening the back cover and making small repairs. Set contents: Three-point support opener, 18 refillable bits (6 small circles, 3 medium circles, 3 triangles, 3 squares, 3 semicircles), fixing base. Size: Main body 16.3 x 7.1 x 1.4 x 1.6cm (160g), Bit case 3.6 x 2.0cm (36.1g), Fixing base 8.3 x 3.7 x 5.0cm (78.4g) Scratches, cracks, etc... None Operation... Good