Abstract: A hand tool assembly includes large and small tools. The large tool includes a large handle having a tool-storing hole that is defined by an inner wall face. The small tool includes a small handle having a front insert portion that is received within the tool-storing hole, and a front end flange that extends integrally, radially, and outwardly from a front end of the front insert portion and that has a rear edge. The rear edge is disposed in front of and abuts against projections on the inner wall face of the tool-storing hole so as to confine the small handle within the tool-storing hole.