This tool is to help consistently punch holes in the sections of a book. The holes in the triangulated bar lead the awl straight down in the folds of a page. The knurled bolt at the base allows you to adjust the positions of the hole pattern.
Guide is approximately 12.5" long with one open end to allow for longer paper to be punched. Distance between holes is 5/8."
Awl for the Awl Guide is sold separately.