Key benefits - High quality material and treatment - Made from vanadium steel with a four-layer anti-rust process and full heat treatment, delivering high hardness, strong torque, good toughness, and durability. - Efficient 72-tooth ratchet gear - 12-point box end with a 72-tooth ratchet gear and a 5-degree working arc. Allows turning nuts and bolts without removing the fastener, making tasks faster, easier, and more efficient than standard wrenches. - Thickened open end for added strength - U-shaped opening head grips four levels of fasteners. Thickened design provides greater torque, resists breaking, and helps prevent angle wear on connecting elements. - Mirror polished finish and clear sizing - Surface is highly polished for rust and corrosion resistance and easy cleaning. Each end is stamped with standard metric size for simple identification. Specifications and features - Material: vanadium steel - Processing: four-layer anti-rust coating and total heat treatment - End details: 12-point box end, 72-tooth ratchet gear, 5-degree working arc - Open end: thickened U-shaped opening for enhanced torque and durability - Finish: mirror polished - Size markings: metric sizes stamped on each end Applications and use scenarios - Automotive repair in tight spaces where a 5-degree arc enables ratcheting without removing the fastener, improving speed and efficiency - Machinery and equipment maintenance requiring high torque in confined areas - General home, workshop, and DIY tasks that benefit from strong grip, durability, and easy identification of sizes Notes - This is a combination wrench designed for high torque and durability, with a focus on reliability, ease of use, and clear size identification.