About this 3D model

I wanted an way to secure a piece of plywood when using 3030 extrusion. M5 holes, 12 mm seemed to work perfectly for me 10 mm was too short Print Settings Printer Brand: Prusa Printer: I3 MK3S Rafts: No Supports: Yes Resolution: 0.3 Infill: 50 Filament: Snolabs PETG Orange Notes: Wall lines: 6 Top and bottom layers: 4 Infill: 50% Layer height: 0.3 Category: 3D Printing