High quality material The key wrench is made from zinc alloy, providing strength and wear resistance. It resists bending and deformation, maintains good mechanical properties at room temperature, and is built for long-term, repeated use. Multifunction 4-in-1 design Includes 2 square shapes, 1 round shape, and 1 triangular shape. Rotate to select the appropriate profile for different fasteners and tasks. Compact and portable Compact size with a length of 7.2 cm. Lightweight and easy to carry in a pocket or toolkit, ready for use in any situation. Broad functionality Designed for a wide range of applications. Suitable for car repairs, instrument repairs, locomotive repairs, and household repairs, covering common tasks that require different wrench profiles. Use scenarios - Car repairs: access and adjust small panels or components in tight spaces. - Instrument repairs: tighten or loosen small fasteners on delicate equipment. - Locomotive repairs: handle small fittings and assemblies in confined areas. - Household repairs: general tightening or loosening tasks around the home.