1: Labor-saving universal wrench adopts one-handed quick operation design, proportional cutting, easy and not tired and more labor-saving 2: The universal wrench is made of high quality high carbon steel + aluminum alloy. It is ergonomic, does not hurt the handle of the hand, is durable and does not rust. 3: Precision tooth design, tightly locked teeth, fast operation with one hand, fast clamping and no sliding 4: Wrench size: 31cm, maximum opening: 7cm 5: Suitable for pipelines, woodworking, machinery and gardening, etc.