Two templates are included with each machine. The templates differ only in the small taper at the front. This small taper produces a secondary angle on the profile which finishes the "tip" profile. The two templates allow the customer to set where on the scrape the "tip" angle begins."Front to back" thickness adjustments are made by adding or subtracting plastic shim washers under the template. The shims are preferred for this procedure because, as opposed to a screw mechanism, adjustments are repeatable and permanent.