The unique function and toggle geometry of the fischer DuoTec allows it to handle very heavy loads for a gravity toggle. Where multiple fixings are required, this reduces the number of fixings and maximises security. As a member of the DUO line, the fischer DuoTec comprises two plastic components. The red and hard component of the plug sleeve facilitates the consistent distribution of the load, while the grey and soft component prevents damage to the panel's surface by the fixing, reducing the load. The fischer DuoTec is set like a gravity toggle for applications in panel building materials. The toggle can also be used as an expansion plug in solid building materials.