Lead anchors are stronger than plastic anchors, but more expensive. In many applications a plastic anchor will be sufficient, but if you want extra insurance, use a lead anchor hook.
A hole is drilled into the wall and the anchor is inserted. The picture hook is then attached to the wall by running a screw through the hook and into the anchor. As the screw is tightened, the anchor expands inside the drilled hole, creating a secure hold on the screw while the screw's head holds the hook in place against the wall.
Whenever possible, drill into a mortar joint for anchors rather than into the masonry material itself. Mortar is softer and less likely to crack. It is also easier to repair and disguise a patched hole in a mortar joint.
With a masonry bit drill a 5/16 inch hole in wall, a little deeper than length of anchor. Insert anchor provided in hole until flush, tapping in with hammer if necessary. Attach hook with screw provided.