KOSOX Connection Adapter with Spring Bar for Apple Watch 1 Set (38mm) Simple & Convenient - Most convenient band adapter in the market, just connect the replacement band with the buckle using the spring bar and then put the buckle into the watch .No longer screws and screwdriver Universal - Compatible with all apple watch. One is for all Durable - High quality alloy metal material. Easy to install and remove Perfect Protection - Seamless connection for metal buckle and Iwatch, protect watch from scratching 2 Sizes - 38mm and 42 mm for your choice. Provided with pin and storage box