Professional Coping & Crosscut Sled w/Auto-Adjust Toggle Clamps 3-Pc. Bessey Auto Toggle Clamp Bessey HH-20 clamps let you hold from 3/4" to 2" thick material without making any adjustment to the clamps! Fastest, safest and most accurate way to produce crosscuts in stock up to 7" wide Solid aluminum construction Lexan visor sits 3" from your work surface and is 3/8" thick so it will not fit into any mini t-track