With a drill and some 3' long, 1-2-20 screws and matching nuts it was very easy to install. It took less than 5 minutes. My office chair's thickness is what required screws of that length. You want screws that are about 1/2 to 3/4ths of an inch thicker than the head of your chair. With the headrest installed and the bolts facing you the headrest itself makes sure you will never see that it is bolted in.And, it does it's job as a headrest, though I wish there was a way make it closer to flush with the back of the chair. When I lean back the headrest quickly becomes uncomfortable due to the angle of my neck. So, not ideal.
Rating: [5 of 5 Stars!]