Control cabinet key / multi-function utility key — durable, compact tool for opening utility locks, valves and access panels. Key benefits Durable construction: made from copper alloy and alloy steel for strength and long service life; resists bending or breaking during regular use. Wide compatibility: five hole sizes/shapes cover common utility fittings so you can open more types of locks and valves with one tool. Saves time in emergencies: compact and easy to carry in a service kit, glovebox, or toolbox for quick access to meters, valves, and control cabinets. Extra function: also works as a small wrench for turning screws and fasteners when sizes match. Specifications Material: copper alloy and alloy steel. Hole sizes / outer circle diameters: 7 mm, 10 mm, 12 mm, 13 mm, 18 mm. Compatibility note: suitable for locking triangles with an inner circle diameter less than 18 mm and triangle side length between 4.5 mm and 13.5 mm. Design: five functional holes for multiple utility fittings. Typical applications (practical scenarios) Emergency shutoff: quickly access a locked water or gas tap to stop a leak at home or on-site by matching the correct hole size. Utility and maintenance work: open electrical or control cabinets, train or elevator service panels, and meter boxes during inspections or repairs. Outdoor use: operate garden or street taps and service valves when keys are not available, and use the tool as a small wrench to turn screws or adjust fittings. What to expect A single, compact tool that fits multiple common utility fittings. Reliable performance for routine service, emergency response, and field maintenance. Fits standard triangle-style utility locks within the size ranges listed above. Pack this multi-function key in your emergency kit, service bag, or vehicle for faster, safer access to utility panels and valves.