These knobs are made of heavy metal and very sturdy.  Nice feel on the fingers, the knob part is solid and not hollowed out.  I ordered the black ones and very happy with them.  The only negative I have about them, they only came with one size screw (1") and they were not long enough for my doors.  Needed 1  1/4", which is a standard size for most cabinets doors.   So, I just used the old ones from previous knobs.