Track Kit Accessories Universal Track Bolts Knobs Easy Gripping T Slot Bolts and Knobs T Track Clamp for Woodworking JigsWELL MADE- The T-track clamp includes T slot nuts that are made of top quality plastic with molded-in brass insert that will not strip T-slot bolts are constructed from strong metal, providing optimal heat and corrosion resistance, offering the ultimate in durability and strength.EASY GRIPPING DESIGN- The 3-prong no sharp edge design of the T knob provides the ultimate in comfort, easy to grip while performing fastening, clamping.