Using a 1/8” drill bit, drill a 3/4” deep hole in the center of the base of the antler.
Instructional Video. < click the link here!

Using the supplied Skull Snap, screw into the antler base. Ensure it is securely fastened. Use a screwdriver for best results.
(Using a drill/impact driver could result in stripping out the antler hole)

Firmly, grasp the Snap Skull and the antler then press the antler base into the Snap Skull. This should take a little bit of pressure and you should hear a click/pop sound.