The universal key for construction technology is a multifunctional tool designed for accessing heating and plumbing systems, air conditioning and ventilation technology, control cabinets in electrical engineering, gas and water supplies, locking systems, and more. This wrench features a variety of square sockets, triangular sockets, socket wrenches, and more. Additionally, there is a 1/4 adapter attached to the chain to accommodate a reversible drill (double bit) with both Phillips and flat head options. Thanks to its compact size, this multi-tool is the perfect companion for builders, maintenance staff, property managers, and others. Constructed from zinc alloy with an electro-polished surface, it offers durability and resistance to rust. Warm Note: Please ensure the size is compatible with your device before purchasing.