Product review (1 stars): Major design flaw.  Do knot buy LG range with these knobs.
Flimsy and breaks in less than a year.  Do not buy an LG range with these knobs.  However, I did get them to replace them for free even though the range is out of warranty, so you can try that if your stuck with broken knobs, so they must be aware of the problem.  Not enough to fix the design, unfortunately.