Southco VISE ACTION Compression Latch, Large Size, Knob Style, Zinc Alloy, Powder Coated, BlackSouthcos VISE ACTION Compression latches provide mechanical advantage, ensuring tight, robust vibration resistant door closure to seal out water and dust in the most strenuous applications. The smooth operation of the VISE ACTION design aligns the cam behind the frame, then draws it straight up tight to prevent scraping against the frame, with a single continuous half turn motion. Its compression action provides consistent 6. 4 mm (. 25) pull up for