Countersink this hole enough to allow the head to sink flush with the surface.
Bore all holes, where shown in the drawing, and countersink them.
Countersink the holes on the side from which the screws enter.
Countersink all holes, except the four holes which hold the supports for the cart handle.
Countersink the hole in the base on the under side with a 1/2-in.
By using ...