Weidmueller CROSS-KEY-DUO

A CROSS-KEY-DUO is similar to a CROSS-KEY-QUADRO, but instead of having four different profiles or bits, it has two.  It's still a universal type of key designed to fit multiple types of locks commonly found on electrical cabinets, enclosures, or similar equipment.  The "DUO" part signifies the two different profiles, making it less versatile than a QUADRO but still useful for situations where you encounter a couple of common lock types.  It's a compromise between having a single, specialized key and a more comprehensive multi-key like the QUADRO.