A railroad trackwork railbound frog assembly having a toe point element is provided with a pair of spaced-apart wing rail elements each having a notch recess feature, a pair of reversible and interchangeable spaced-apart wing rail insert elements, usually fabricated of a manganese alloy steel or a high-strength, low-alloy steel material that is harder than the material from which the wing rail elements are manufactured, installed in abutting relation to the wing rail element notch recesses, spacer blocks that maintain the separations between the toe point, wing rail, and wing rail insert elements, and bolt-type fastener devices joining the elements of the frog assembly into a unitary structure.