The pictorial directions on this were vague, confusing, no words, and in metrics. Also many of the pictures did not apply to this particular model so we had to figure out which ones were applicable to my door. We had to install a header board because the drilled holes do not line up with 16" studs. FYI, the bolts that attach the wheels to the door are too long. Even though this hardware is supposed to be for this door model, the door is too thin for these bolts to work.  So you will either have to saw off about 1/2 inch or get shorter bolts.