Massca Hold-Down Clamp | Heavy Duty Made from Strong High-Grade Carbon Steel for Home & Workshop Use | 5-1/2" L x 1-1/8"Massca Heavy Duty Hold Down Clamp Our Massca Heavy Duty Hold Down Clamp is great for routers, CNC, drill presses, saws, and all your assemblies and jigs. Behind its heavy duty hold is its strong high grade carbon steel composition that's also built to last. The bottom of the clamp slides neatly into all t track slots and is easily adjustable to anywhere along a T track. Set of 2 Fits 5 15 " T slot Measurements: 5 1 2" L x 1 1 8" W