You can drill a hole in the slats of your current shutter and place the post. Hand rivets for securing Please use it according to the change, such as when you have received a newspaper, etc. Hand rivets for securing Replacement Instructions: Drill holes in the slats and secure with hand rivets. Drill holes in the slats where the post lid will fit. The long hole on the slats can be used to make a golden saw. Cut the left and right with a pair of scissors from the edge that has been cut. Secures with hand rivets for 3.5φ