Designed to fit SawStop RT fence miter slots, this vertical feather board provides downward pressure to keep your workpiece in position and help prevent kickback. Actual dimensions: 4" w, 7 1/2" d, 2 1/8" h Holds your workpiece safely against the router fence for added stability Easy-grip lock knobs Compatible with all SawStop Router Tables and Fences T-slot dimensions: 1/2” W x 7/16"D