Abstract: A holder for tools, on a perforated board, with a plate-like base (1) for retaining a tool carrier (4), the base being provided with a slot (9) extending from a center hole away from a supporting beam (2) and terminating at a bottom perimeter edge of the base. The slot (9) extends through a cutout portion (10), into which is inserted a twistable locking member (11) having a claw (15) on a side of the base opposite a handle (13) for cooperation with a hole in the perforated board. By movement of the locking member along the slot (9), the claw is insertable into a hole of a perforated board and is able to grasp there behind the board to secure the holder in a desired position.