An absolute must for precision and safety, this tough polymer fence featherboard can be used in both infeed and outfeed applications. The featherboard mounts with the included heavy duty T-bolts and large, easy-to-grip threaded knobs. Fits all Rockler T-slot fences and can be used with material up to 1-1/8" thick. Technical Details Fits all Rockler T-Slot Fences Ideal for router table and drill press operations Includes large threaded star knobs for secure lockdown Knobs' metal threads and T-slot bolts are 5/16" x 18 TPI Â