With the Dead Eye Sight Pin Calibrator just print out a sight tape using any of the popular sight tape software programs and the flexible arm of the Dead Eye will hold your sight tape in position to let you adjust each pin to the sight tape. After you are sighted in you can use the Dead eye to confirm your pin gaps to ensure that your pins have not moved or been bent. If you don&';t have any of the sight tape software programs the Dead Eye comes with 100 preprinted sight tapes.