This is the same adjustable aluminum bar that comes standard on Kreg's Precision Miter Gauge. Super for making sliding cut-off tables, box joint jigs...you name it.
The 3/4" wide x 3/8" thick bar has six "snug-ness" plugs along it's 30" length to take up any play in the miter gauge slot. Plugs adjust with the turn of a screwdriver.
Mounting holes are located every 4" along the length of the bar. Perfect for building workshop jigs and fixtures. Sold as a single bar. USA