ToolCurve Parallel Guide Set Includes: (2) Guide rail brackets with (6) 5mm knurled screws (2) Length adapters with (2) 5mm knurled screws (4) 30mm t-nut spacers (2) 65mm dual t-nut spacers Please note: The ToolCurve Parallel Guide package DOES NOT include the Incra T-Tracks Plus. These must be purchased separately for your desired size. They offer 18in, 24in, 36in and 48in lengths . You will need a pair of any size to complete your parallel guide set.