SCHNELLER SCHNALLER is a futuristic closure mechanism with which one can set and tighten a strap. By stroking over two cylindrical wheels with ones fingers the fastener slides in the required direction and accordingly tightens or loosens the bill. The system can be locked in the requested length adjustment by slewing a pivotable lever into the strokes of the front wheel in order to block its rotation. The aesthetic of the object deliberately refers to the manufacturing method with two-component-3D-printing since it stands out with a filigree, open and polygonal exterior shell that is only possible with such production process.