Widths of the rungs are 10, 20, 30 and 40mm. The best place to mount it is above the door. You can narrow the size of the rungs down by inserting wood spacers which are supplied with the board. Compared with conventional climbing hold materials, wood is more friendly to the skin of your fingers.
Woodboard is fixed with 4 wood-screws M 6.0x70mm, which together with plastic dowels included in package.