This is a belt buckle. A motor cycle protruded. 3d printable stl file attached. You can use belt width 40mm-60mm. Also can scale up or down the buckle to adjust your belt with the buckle. User hard filament or metallic filament to print the buckle. If you print with plastic filament, then apply metallic paint to look metallic. But I can't ensure you that, it will break or not! 3D editable STEP file also attached.

Custom size and design possible, you have to contact with me for more details.

Best Regards,Mahbub