Watch repair kitMaterial: metal, plastic.Comes with a carrying case: 20.5cm x 10cm x 5cm (L*W*H).Spring bar remover for strap adjustment/replacement.Anti-magnetic screwdriver for removing battery covers.6 watch size spring pins . ProfessionalThis high quality 151-piece watch tool set is very suitable for professional and general use and for repairing and adjusting your watches. There are large adjustable case openers, precision screwdrivers, hammer, tweezers, watch holders, case opening knives, watch holders, etc. Perfect for watchmakers, collectors, beginners, etc. Portable Watch Repair Kit151 pieces is in a black nylon bag. You can store all the accessories in your pocket after use to avoid loss. This is a user-friendly and space-saving tool box. FunctionalSmall, clean and functional. This watch repair tool kit helps you solve your watch problem at home instead of going to watch repair shops, its really a good way. For example. adjust watch straps, open watch backs, change watch batteries, change watch gaskets, etc. Widely UsedPerfect for watchmakers, collectors. Durable, portable, convenient, practical and very easy to use.