The DCT T Slot Hold Down Clamps are designed to provide high-tension clamping pressure on a variety of woodworking projects by fitting into your tabletop T-track for use with routers, saws, CNC, drill presses, and other tabletop tools. Each clamp bar features non-marring rubber pads to protect your workpiece, while the T bolt features a 3.5-inch length to allow a working range up to 2.5 inches. The clamp bars also feature a bent shape to ensure optimal leverage, while the 5-star knob adjusts easily to securely tighten the workpiece to your workbench. The single clamping set includes (1) 5/16-inch 18 thread T bolt, (1) 5-star knob, and (1) 5.5 x 1-inch (14 x 2.5 cm) bent hold down clamp bar. Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.