Zinc Alloy Wrench Multi-Function Square Wrench Universal Construction Wrench with Allen Key Anti-corrosion Wrench compatible with Measuring Open Door Window Cabinet - Silver Corrosion Resistant, High Hardness: Our universal construction wrench is made of zinc alloy. The universal key features a shiny nickel finish. It prevents corrosion and resists most acids and other corrosive agents. It undergoes heat treatment and hardening treatment. Measurement with clear scale: A scale behind the square key measures cylinder lengths from 25 to 75 mm. It uses laser engraving. The scale is accurate, the writing is clear, and it is not easy to wear, thus preventing corrosion and provides accurate measurements for your long-term use. Square chuck key: Architect's key with cylindrical nose compatible with mortise lock, without profiled cylinder in the outer structure of the case. 3 square keys in sizes 6, 7 and 8 mm. Check the heating valve or open the ventilation grille. Allen Wrench: This universal construction wrench features a 3mm Allen key and a short sprocket with a flat cam on the end. For loosening or securing door handles. The control cabinet and the service covers can also be opened effortlessly. Versatile Construction Wrench: The construction wrench is a measuring ruler used to measure the angle of a profile cylinder. The construction key works as a recovery tool, especially in hull construction. The structure key is the ideal aid as a switch cabinet key or as a door handle that has not yet been installed. It can also be used as a bottle opener. Quantity delivered: 1 piece