collaborated with a tool manufacturing enterprise to customize hardware jaws for industrial adjustable wrenches. Made of 40Cr high-carbon steel through precision forging and high-frequency quenching processes, the hardness reaches HRC55. The anti-slip tooth pattern of the jaws is tightly engaged, firmly clamping bolts and nuts without slipping. The laser scale is precise and clear, allowing quick adjustment of the opening size to adapt to fasteners of different specifications. The blackened rust-proof surface withstands complex working conditions on construction sites, with a service life of more than 100,000 times. This jaw helped the partner increase the wrench torque by 30%, raise the product qualification rate to 99.8%, and become a hit accessory in the industrial tool market.