The front opening is allowed thanks to the upper protruding part (on the worktop) of the front itself. A middle handle-rail in extruded aluminium is set when drawers and heavy-duty drawers are used.

K21
The K21 kitchen model originates from the innovative concept of the designer Norbert Wangen who, in the K series designed for Boffi, has transformed the concept of compact kitchen. The wall or peninsula/island modular base units have no handles: the door opening is guaranteed by the particular wrapping shape of front panels that hides, with close doors, the worktop thickness giving an extremely defined and monolithic appearance to the composition, highlighted by the worktop with basin effect.
A minimal and comfortable door opening is guaranteed by the particular section of the handle, together with internal tilt of the worktop to its surface.
Wood peninsulas can be integrated in the unique worktop, offering additional work or convivial areas.

Norbert Wangen is a German architect and designer internationally acclaimed for his revolutionary approach to kitchen architecture. He rose to prominence with the creation of the K series—monolithic kitchen blocks featuring integrated, sliding tops that conceal fully functional cooking systems. This concept redefined the relationship between form and function in contemporary kitchens.
Since joining Boffi in the early 2000s, Wangen has become one of the brand’s most influential collaborators. His designs, including the iconic K2–K6 series, have helped shape Boffi’s identity in the field of minimalist, high-performance kitchen systems, blending architectural purity with technological innovation for both indoor and outdoor living.