Gibraltars universal Quick Release flat plates used for joining work surfaces together are easy to use, and made from heavy 11 gage steel. Each carton comes with 10 complete units giving you the ability to join six tables together. Simply loosen the hand knobs, slide tables together, tighten hand knobs, and go to work. Tops are joined level and secure. Our low profile knob eliminates any conflict between the user and the release mechanism. The plates are powder coated black for a high quality finish.