Dongguan Kaihao spring rectangular spring and ordinary spring what is the difference?

Rectangular springs, also known as die springs, because of the production of materials for the rectangular cross-section, so called rectangular springs. SPEC rectangular springs is the United States United Springs, Inc. production of spring brands, United Springs, Inc. is the world's largest manufacturer of precision springs began in 1857. SPEC rectangular springs over the years have been known for their stable performance. SPEC rectangular springs are ideally suited for high loads where space is at a premium and are designed to be used in holes or on shafts for high speed compression and heavy loads. Rectangular springs are made of square wire, whereas regular springs are made of round wire. Rectangular springs are much stronger and have better fatigue resistance than regular springs.