collaborated with an outdoor luggage brand to customize hardware adjustment buckles for backpacks. Made of 304 stainless steel through precision stamping and quenching processes, the adjustment buckle can bear 50kg, easily fixing the length of the backpack shoulder straps. The multi-gear tooth pattern is tightly engaged, not easy to loosen and slip after adjustment, suitable for people of different heights. The matte black electrophoretic surface is scratch-resistant and wear-resistant, suitable for complex outdoor scenarios, easy to install and quickly replace damaged buckles. This customized adjustment buckle helped the partner improve the comfort of backpack products, increase repurchase rate by 22%, and become the core supporting component of outdoor backpacks.