The Knipex 00 11 Pen Style Control Cabinet Key is a compact, multi-functional access tool designed for electricians, HVAC engineers and maintenance professionals working with control cabinets and utility shut-off systems. This versatile pen-style key combines four different key profiles in a single portable tool with a convenient fastening clip for easy carrying. The swivelling key holder provides access to square profiles (5.0mm, 6.0mm and 8.0mm), a triangular profile (9.0mm), and a double-bit key profile (3-5mm). A universal 1/4" bit adapter with permanent magnet accepts standard bits, with an additional bit adapter housed inside one key profile for extended functionality. The tool includes two reversible bits as standard: cross recess PH/slot 7.0 x 1.2mm and TX20/TX25. Ideal for accessing control cabinets and shut-off systems in gas, water and electricity supply networks, this key is equally suited to technical installations including air conditioning and ventilation systems, shut-off valves and main switchboards. The compact pen-style design makes it perfect for engineers and contractors who need reliable access to multiple cabinet types without carrying bulky key sets. Features and Benefits: • Four key profiles in one compact tool reduce the need for multiple keys • Pen-style design with fastening clip for convenient pocket carry • Universal 1/4" bit adapter accepts standard bits for versatile applications • Magnetic bit retention ensures secure holding during use • Includes two reversible bits covering common fastener types Specifications: Capacity square: 5.0 / 6.0 / 8.0 mm Capacity double-bit key: 3 – 5 mm Capacity triangular: 9.0 mm