Rotate the locking switch to align the yellow indicator dot with the red dot, securing the handle to prevent wobbling. The ergonomic handle features a human-centered design for comfortable grip and effortless operation. Important Notes: Never use the cable cutter as a hammer or subject it to impact, as this may deform or damage the blades. Do not extend the handle arbitrarily. Different cable cutter specifications have distinct application ranges; never exceed the specified range. Each time the movable handle is actuated, the rotating blade handle advances one tooth with a distinct “click” sound. Failure to produce this sound indicates an internal malfunction requiring immediate repair. After prolonged use, blade wear is inevitable. Sharpen with an oilstone or high-speed grinding wheel; replace immediately if severely damaged. Regularly inspect the handle's insulating sleeve for damage. Check all screws on the end cover plate; retighten any loose screws. Lubricate the oil hole as frequently as possible. Strictly prohibited from cutting: Reinforcing bars, steel strands, and other rigid materials.