1Made of steel material, firm and durable, not easy to deform, and has a long service life. 2With fine workmanship, good details, which is easy to install and practical for use. 3Light weight and small size, make it is easy to store and carry, bring you much convenience. 4Professional watch repair parts, suitable for watch repairers and watchmaker. 5Allow you can replace the watch crown to repair your watch, which can save your repair costs.