Wall clamps offer a rapid means of attaching a mounting box to a 12-13 mm thick board wall. Wall clamp AS8.13 is available for 12 - 13 mm. The hole is made with an AT5 hole saw (Ø 74 mm), and the board clamps are placed on either side of the board. The box is pushed through the hole from behind the board, and becomes locked between the board clamps.