Our Calzone/Ascot^® Strongbox cases are constructed with 3/4″ Baltic Birch plywood that is joined with deep rabbets then glued, nailed and screwed together. The inside construction involves a series of reinforcing braces that are glued, screwed and nailed into position. A Strongbox lid has a special hinge that enables it to be thrown back 270 degrees and lay flat against the back of the case. This is held in place with an arrangement of screws, bolts and T-nuts. Coating the Strongbox with black texturlac finish makes for a great appearance. Note that internally installed 3/8″ T-nuts prevent the stripping of the wood when caster bolts are installed, making replacement of casters easier and more secure.