Abstract: A secure locking slide for sliding along a zipper comprising: a slider housing which includes: a front member; a back member coupled to the front member; and a locking assembly rotatably coupled through the front member, having a locked and unlocked position. Transition between the locked position and the unlocked position is accomplished by rotation of the locking assembly substantially normal to the front member. The locking assembly includes a threaded member, rotatably coupled through the front member; and an elongated tab. The elongated tab is pivotally coupled to an end of the threaded member. The threaded member also includes a flange with a spike portion, to imbed the locking assembly in between zipper teeth. An inset cavity on an internal side of the front member, sized to receive the flange, provides the locking assembly an anchor to the front member. A visible indicator indicates an unlocked and locked position.