Sturdy construction The tensioner wrench is built from 40CR alloy steel for erosion resistance and long lasting performance. It delivers strong mechanical properties to withstand daily use in a variety of projects. Adjustable and versatile Featuring an adjustable jaw, this multi function wrench easily fits a wide range of fastener sizes. Its versatile design makes it suitable for many tasks without needing multiple tools. Comfortable handle Ergonomically designed with a non slip, high hardness handle, it provides a secure and comfortable grip even during extended use. You can work with confidence. Accurately machined Jaw screws allow smooth sliding for quick and precise size adjustments, providing convenient and reliable operation. Key benefits - Durable construction from 40CR alloy steel for longevity and consistent performance - Wide fastener compatibility with an adjustable jaw for many sizes - Comfortable, non slip grip reduces fatigue during use - Smooth, precise adjustments for fast, reliable changes Specifications and features - Material: 40CR alloy steel - Function: tensioner wrench with adjustable jaw - Handle: ergonomic, non slip, high hardness - Machining: accurately machined jaw screws for smooth operation Use scenarios - Home and DIY: assemble furniture, tighten or loosen diverse fasteners around appliances and hardware - Automotive and machinery maintenance: adjust belt tensioners and related fasteners in engines or machinery - Bicycle and equipment upkeep: service bikes, brackets, and small fasteners that require variable jaw sizing