1、Wide Compatibility: The metal connected adapter is compatible for Galaxy Watch 4 models, including for Galaxy Watch 4 44mm / 1.73in, 40mm / 1.57in and for Galaxy Watch 4 Classic 42mm / 1.65in, 46mm / 1.81in. 2、Manufacturing Material: High quality stainless steel adapter connector ensures a reliable connection to your strap for Galaxy Watch 4. Compared with other materials, it is more durable, wear resistant and corrosion resistant. 3、Easy to Install and Remove: Simply replace the buckle with a buckle using a spring rod and insert it into the holes on either side of the adapter lugs. It will integrate seamlessly with your strap for Galaxy Watch 4. 4、Quick Release Spring Rod: The two sides of the spring bar can be quickly and easily adjusted, and it also ensures a secure lock for your watch. The adapter connector holds tightly for Galaxy Watch 4 , eliminating the need to replace them often. 5、Easy Installation and Adjustment: Stainless steel is durable and strong, providing maximum comfort and air permeability. Lightweight and slippy, the strap won't squeeze, rub or irritate your skin.