Since a piano is such a heavy duty musical instrument, it can be hard to move. By creating a dolly for it, you can put the piano on wheels and turn the job from a multi-person moving project to a one-person move. All of the materials used in making this dolly can be found at your local hardware store and/or lumber store.
Lay out all of the 2-by-6s. Take one of the casters and place it centered at the end of each board and use a pen or pencil to mark where the holes of the caster will be.
Plug in the electric drill and use it to drill a hole at each mark you made with the pen.
Take one of the larger boards and one of the smaller boards and place their ends together to form an L shape so that the holes you drilled line up with each other.
Take one caster and line that up with the previously lined-up boards. Make sure the small board is on top of the larger board and the caster on the bottom side of the larger board. Insert a single bolt into one of the holes and use the wrench to tighten the nut on the bolt; this will hold all the pieces together while you insert the rest of the nuts and bolts and use the wrench to tighten them as well.
Continue to secure the boards and the casters together until all four casters have been bolted tightly to the boards.
Spray the rubber coating onto the surface of the 18-inch 2-by-6 boards and let dry for several hours in a well-ventilated area.