Fastex is a type of buckle that is commonly used in the manufacturing of bags and clothes. It is a brand name of a quick release buckle made of plastic or other materials. Some synonyms for Fastex include snap buckles, quick release buckles, side release buckles, and push-release buckles. Other similar terms for Fastex buckles may include safety buckle, ratchet buckle, and strap buckle. The use of these synonyms can help in finding similar products of different brands or materials. Whatever they are called, these buckles provide a convenient way of fastening and releasing various items securely.