T-slot track is an indispensable component of jigs, fences, router tables and other shop fixtures used in woodworking. The extruded aluminum track accepts the head of any standard 1/4-20 bolt to let you attach hold-downs, feather boards, stops and other accessories anywhere along the track's length. To install, drill & countersink holes along the bottom of the track and secure using #6 flathead wood screws (not included) or use epoxy for a screwless installation. Track dimensions are 3/4" x 3/8".