Our miter combo track is a marriage of our Miter Track and our HeavyDuty T-Track. One side of the track fits a standard 3/8" x 3/4" miter gauge. T-Slot inside dimension is 29/32"w x 5/32"h. The other side fits a 3/8" hex head knob and bolt for all your clamping and hold down needs. Inside dimension is 9/16"w x 11/32"h. There's no need to add another fixture to clamp a stop block or featherboard to this track. It makes set-up quick and easy. This is the perfect track for shop built table extensions, router tables and bandsaws. Color may vary.