First of all, ‌material‌ is one of the important factors in evaluating the quality of hinges. Good hinges are usually made of cold rolled steel or stainless steel. Cold-rolled steel has high strength and a bright surface, but is not resistant to moisture; while stainless steel has good toughness and strong corrosion resistance, but the price is a little higher than cold-rolled steel. Secondly, the ‌feel‌ing is also the key to judging the quality of the hinge. High-quality hinges feel thick and have a smooth surface, while inferior hinges appear thin and have a rough surface.   ‌Durability test: the opening and closing test can reach 50,000 times. According to the acid-base and salinity test, the corrosion resistance time of a good hinge can reach 48 hours. At the same time, you can distinguish good from bad by listening to the sound. The design of high-quality hinges even achieves a silent effect. Resilience‌ is an important indicator of hinge performance. Good hinges have uniform rebound force and are durable in use, while inferior hinges may have insufficient or excessive rebound force. In terms of color, high-quality hinges have bright colors and smooth surface treatments, while inferior hinges may have dull colors and rough surface treatments.   Finally, choosing hinges from well-known brands can usually guarantee a certain quality. Hinges from big brands are more secure in terms of materials, workmanship, and after-sales service.