【 45 #Steel Construction】Made from 45# steel for strength and durability, ensuring reliably in various working conditions and heavy duty applications 【Polished Anti Rust surfaces】Fully surfaces not only enhances appearance but also resists rust, keeping the wrench clean and extending its life with easy maintenance 【Double End Design for Versatility】Features double ended hexagonal heads for different bolt sizes, ideal for home repairs or professional projects, offering wide ranging adaptability 【Enhanced Torques Performances】It making tightening or loosening screws more efficient and effortless, especially for stubborn fasteners 【High Hardness & Toughness】Specially treated to achieve excellent hardness and toughness, deformation or breakage during prolonged use while maintaining stability and, Manufacturer: Kfwfuaee