The Knipex 00 11 Universal Construction Utility Key is a versatile multi-profile key designed for accessing locking systems across electrical installations, gas and water supply, HVAC systems, and industrial technical facilities. This professional-grade tool consolidates nine different die-cast zinc key profiles into a single compact unit, eliminating the need to carry multiple keys on site. The construction version features a plug-in, magnetically held support system with a catch mechanism for locks with profile cylinder holes and stepped male square fittings. The integrated bit adapter accepts standard 1/4" bits with magnetic retention, adding screwdriving capability to the tool's functionality. With an extended length of 157mm and a compact 95mm configuration, the key includes a detachable chain and snap hook for secure attachment to belts or tool bags. This universal key accommodates a comprehensive range of profile types and sizes, making it ideal for electricians, plumbers, HVAC