geometric keychain 3d model

Create a high quality 3D printable minimalistic keychain accessory. Clean geometry, no complex curvature. Flat surfaces optimized for FDM printing. Overall size around 50mm x 20mm x 3mm. Include a built-in keyring loop hole on the right side (10mm x 8mm inner opening). Design style: premium, futuristic, geometric sharp sleek look. Model must be manifold, watertight, no non-manifold edges and no internal geometry. Output as a solid STL suitable for direct 3D printing. Do not include text or branding. Make the edges slightly chamfered for better handling and aesthetics.