1[Hollow Design] The hollow design makes the watch movement more design, simple and easy to use. It is an exquisite watch repair accessory. 2[Automatic Movement] Using an automated movement, you don't have to worry about its battery life and it also has a long service life. 3[Small and Portable] Small and convenient, this watch movement is convenient to store and carry, with storage box, which is not easy to lose. 4[Durable Material] Made of alloy material, this mechanical movement is durable, not easy to deform, can effectively resist oxidation and rust. 5[Professional Tool] The watch movemnet is one of the professional watch repair tools, suitable for repairers, saving you expensive repair costs.