BESSEY Newest innovative clamp designed for holding materials safely and securely on the MJDF tables that are equipped with matrix holes an T-tracks. Track saw guide slots make for secure & fast clamping. These clamps feature specially forged fixed arm for 12 x 8 mm grooves. Ergonomically shaped wooden handle or rachet-action lever handle for more clamping force, up to 5 times faster then conventional clamps. BESSEY. Simply better.