This is a complete setup for creating a set of vertically hanging Skadis panels that connect together with a wall offset. The hanging vertical panels just screw together to be very secure, and includes a wall bumper to maintain the offset.

You only need to use a screw and wall anchor to mount the top/first Skadis panel. The hanging panels, can use the included connector, wich you simply screw together with the included cap and cover (you do not need to screw into the wall unless you have very heavy objects on your skadis board). The recommended screw width is a #6 wood screw (~3.5 mm diameter) that's 1 inch long for the the vertical panels. If your mounting through the wall offsets and into the wall to anchor them, you'll just need a longer screw (~2 inches).