Here are 3 pieces that came together in a vintage construction set in years past. Hubley was a well known toy maker from Lancaster, Pa. and is no longer in business. I believe the 3 pieces are a grader, pan and dozer and are made of metal. Wheels may be made of other materials. The 3 pieces have been played with and do show some paint loss as shown. Some little fellow loved to play in the dirt with these years ago.