To use drill a pilot hole then tap the entire bolt sleeve and screw into the hole until flush against the wall.
How to hang a mirror on a wall with string.
Thoroughly clean the wall tiles.
Make sure there is no grease or moisture on there.
Leave to dry before fixing the mirror.
Then buy some hanging hooks that are strong enough to support that weight.
Slide the mirror into the bottom clips.
Hold the mirror against the wall at the desired position.
Center it under the top of the mirror and hold it up tight under the wire until the wire is taut.
Then firmly press in place all around using a dry cloth or towel.
Take a small piece of wood approximately 12 inches 30 cm long and mark its center.
Determine the position of the two fasteners with a block of wood.
Screw on the rest of the top clips to secure the mirror against the wall.
Place the mirror against the wall and check again that it is level.
Mark the location of the top edge and the center of the frame.
Molly bolts are a medium weight hollow wall anchor.
Tighten the bolt into the wall to expand the anchor.
Carefully tilt the mirror back so it rests flush against the wall.
Apply the glue to the mirror in staggered strips keeping 5cm from the edge.
Once you have hanging hooks mark where you want to hang the mirror on the wall and drill a hole for the hook.
Set the mirror down.
Place a scrap piece of wood that is approximately half as long as the mirror is wide underneath the hanging wire on back of the frame.