Woodhaven 4248 One Track One Track provides an unlimited variety of quick and easy mounting and adjustment options for stops, hold-downs, etc. Anodized aluminum for strength and durability. Place on top of a wood fence and add a stop for an economical chop saw fence. Great inexpensive miter bar too! Recess into a table for hold-downs and fence adjustment. T-slot in the track captures the head of a standard 1/4" hex bolt or our oval nuts. Not drilled, mount with screws or glue. These tracks are some of the most versatile jig building accessories you can use in your shop. Note: T-bolts do not fit in this track. 48 long x 3/8" height x 3/4" width Lifetime guarantee against defects in material or workmanship. Made in the USA!