So the other day, I found a wonderful set of large knob-shaped wall hangers from Sheffield home at T.J Maxx, so I bought them all. But when I got home, I realized that there was no hardware included with the knobs and no directions on how to install the hangers. Does anyone out there know how these particular knobs should be installed and the hardware to use?

Update #1
So, I installed using the screw as prescribed by several of the contributors here. Using a ballaster screw, I was able to get the screw into the keyhole but noticed the knob was not quite as tight as I would have liked. So I attempted to push the screw further in and that resulted in a disaster. The Knobhead shattered, leaving me to discover that it, in fact, had a width of about 0.03 inch to work with. One of the thoughts I had was to fill the whole with wood filling. An example of what I started is in the lowest pics.





