The universal key for building technology is a versatile key for opening heating and plumbing, air conditioning and ventilation technology, control cabinets in electrical engineering, gas and water supply, systems lock and much more. The wrench has many square wrenches, triangular wrenches, socket wrenches and socket wrenches. As an additional tool, there is a 1/4 adapter hanging from the chain to accommodate the reversible drill bit (double bit) with a cross and a slot Due to its compact dimensions, this multi-tool is the ideal companion for all builders, caretakers, apartment managers and more. Made of zinc alloy with electro-polishing surface, it is durable and rustproof Warm note : please make sure the size fits your device before purchasing Product Description Features: Material: zinc alloy Surface treatment: electro-polishing Overall size: 8.6 * 6 cm / 3.4 * 2.4 inch Scope of delivery: 1 * Cross button 4-way multifunction