Alulock is a connecting device for aluminium concrete formworks and comprises no more than three parts: a rigid bracket with large contact surface that also serves for aligning; a moveable bracket; and a wedge. It allows for a flush and tight connection between formwork panels. Even compensatory adjustments up to 100 mm are possible. In the design, special attention was placed on easy and tireless handling of the Alulock system. Function and ergonomics are united in a castable form. A few easy manipulations and the formlock panels are connected.