This UGEARS trailer for the legendary HEAVY BOY VM-03 truck is a detailed wooden 3D puzzle that combines a traditional material with mechanical motion. Assembly requires no glue; the parts are removed from pre-cut boards and easily put together following the step-by-step illustrated instructions.

The model is designed for smooth running and is fully functional with proper maintenance. To minimize friction in rotating parts (especially axles), we recommend lubricating with wax from a regular candle, as described in the manual. The trailer is a great addition to the HEAVY BOY VM-03 model and provides hours of fun while exploring the secrets of mechanics.

• Glue-free assembly – clean and enjoyable building.
• Mechanical features – moving parts and realistic operation.
• Precision craftsmanship – quality wood and detailed design.
• Educational value – develops motor skills, patience, and understanding of gear trains.