There is a hole so you can insert an m3 screw through the pdb to secure the mount in place, use a nut to hole the screw in. *EDIT 5/22/2016* Rev 2 now has a slightly thicker base with fillets for improved durability. *EDIT 10/24/2016* Rev 2.1 now has fixed post spacing and it now extends the full length of the post.