robotica keychain 3d model

Create a 3D-printable keychain measuring 70 mm (length) × 20 mm (width) × 4 mm (thickness). The base is rectangular with 4 mm rounded corners, a flat back for bed adhesion, and subtle engraved circuit/tech patterns (0.4 mm deep) on the top surface. The word "ROBOTICA" is centered on top, uppercase, bold futuristic font (Orbitron or Eurostile), extruded 1.5 mm above the base, with 0.8 mm filleted edges and minimum 1.5 mm stroke width. A 5 mm keyring hole sits 6 mm from one short edge, reinforced with a 1 mm collar and 1.5 mm raised ring. Built as two separate shells for dual-color FDM printing: base in color 1, text in color 2. Fully manifold, no non-manifold edges, minimum 1.2 mm wall thickness. Export as binary STL at 0.1 mm tessellation resolution. Print flat, no supports needed.