These brackets bolts to the wall and hinges outward to provide an extremely solid support for your bench or table. When you want to collapse the table you release a small catch and the arm folds back into the channel which is mounted to the wall. The distance from the wall to the table when it is collapsed is 1" The length of the part that fastens to the wall is 6-1/2" and the supporting arm is 12" long Sold by 4Pcs, fastners not included