From the Manufacturer
The Milescraft Model 1407 D/TFeatherBoard has the dual slide motion and unique pre-load tension design features of the 1406 FeatherBoard and includes a sturdy spacer for tall stock cutting operations. The D/TFeatherBoard includes two 3/4-Inch and two 5/8-Inch miter bars as well as four T-Slot bolts allowing it to be used as either dual OR tandem feather boards in nearly any application on router tables and table or band saws.
The Milescraft Model 1407 D/TFeatherBoard has the dual slide motion and unique pre-load tension design features of the 1406 FeatherBoard and includes a sturdy spacer for tall stock cutting operations. The D/TFeatherBoard includes two 3/4-Inch and two 5/8-Inch miter bars as well as four T-Slot bolts allowing it to be used as either dual OR tandem feather boards in nearly any application on router tables and table or band saws.