Positioning the Back Rail Pins
Draw a horizontal line 7/16” [11.1mm] from the rear edge of the blank and label it ‘Line VW. Draw a second horizontal line ¾” [19mm] from the rear edge of the blank and label it ‘Line TU. On line VW draw a small vertical line at the center of each key. Get as close to the center as you can by eye-balling it. These marks will represent the positions of the back rail pins. Line TU will be used later to cut a rabbet into the rear of the keys. Your key blank should look like this.
