Abstract: In a filing cabinet arrangement of vertically disposed drawers mounted on progressive two or three channel drawer slides an improved interlock or anti-tip mechanism is used. By means of a uniquely configured cam, the cabinet of drawers provides both an anti-tip mechanism as well as an anti-rebound quality which ensures that a drawer, once returned to the cabinet, does not rebound outwardly. In addition, this device will act as a security lock mechanism in conjunction with installed locking apparatus. The particular inventive features lie in the simplicity of the mechanism and in its space saving qualities. No additional space in a cabinet, other than that required for the drawers and the drawer slides, is necessary. The mechanism is economical, simple and worry free in its operation. It is adaptable to any file cabinet situation where two or three channel progressive drawer slides are used.