Buckles can be categorized by their use, including bag buckles, butterfly buckles, military buckles, aluminum case buckles, and airline case buckles. Additionally, depending on the application, there are also high-altitude safety rope buckles, car seatbelt buckles, and knitting machine buckles (also known as triangular seat slides). Common materials include stainless steel, chrome-plated iron, and galvanized iron.
The terms "buckle" and "hook and latch" have essentially the same meaning; they are simply different names for the same type of hardware in different fields. The automotive industry often uses "buckle," while the machinery industry tends to use "hook and latch."
