Abstract: A single piece file clasp, molded from a resin material, includes a main body portion and two prong portions extending from opposite ends of the main body portion. A series of equally spaced holes are molded in one of the prong portions and at least one post is molded in the other prong portion. The post is molded with a knob at its end which is dimensioned to provide a snap-fit engagement with any one of the holes to secure the prong portions together at varying amounts of overlap between them.