You need the following to assemble: screwdriver, leveller. Before you start: Finish assembling the drawer system unit with frame sides, crossbars and drawers.  If needed, cut the closet rod to the desired width. Step 1: Click on the frame side piece (A) onto the outer frame side by snapping it onto the outside of the top two runners. Aim for a position close to the middle of the runners in order to get even hanging space back/forward. Step 2: Click the closet rod (C) into place into the frame side piece (A). Step 3: Place the drawer system unit in the desired position and then click in the closet rod into the wall piece (B). Preferably, use a leveller when aiming to get the right position for the closet rod holder wall piece. Step 4: Mark in the holes of the wall piece, where to place it on the wall. Remove the closet rod from the holder and then screw the wall piece into the wall. Step 5: Click the closet rod into place between the closet rod holders.