These 3/4" x 3/8" Miter T-Track Nuts allow you to use fences, clamps, and featherbaords in any standard Miter T-Track found on Tablesaws, Router Tables, Bandsaws, and many other Woodworking machines. Available in three different mounting thread sizes including; 1/4-20, 5/16-18, and 3/8-16, these specialty nuts are a perfect mounting solution for homemade jigs and fixtures. Looking to mount your Woodpeckers router fence to our Plycore Router Top (item RTT-002)? No problem, just purchase the 1/4 -20 T-Track Nuts (item 100-671) below. Sold in packs of 10.