Each clamp needs one M6 nut, two M6 x 20 bolt and one suitable washer.

Print Settings:

Orientation: Print the pieces as oriented

Rafts: No

Supports: No

Resolution: 0.2mm

Infill: 10 ÷ 20%

Filament: Any PLA

In case you would like to make it out of wood I have also published the dxf files of the two faces to be milled, with the two reference holes for centering and tilting