This is an adjustable copy stand that allows an iPhone to be used as a scanner. Glue the cradle onto the cradle arm, matching up the notches, so that the hole is at the upper left. The cradle arm fits into the short end of the shaft; the long end of the shaft fits into the base. Use a #10 x 1.5" bolt to secure them. Screw the feet of the base into a sheet of plywood.