Product review (4 stars): Exactly like the originals, unfortunately.
These were a perfect fit for my Jenn-Air dual fuel, five-burner range / oven. I could have given them a five star rating because they are exactly like the original knobs. I could have have given them a -3 star rating (had that been a possibility) for the exact same reason. These knobs, as are the original, are junk. I agree with every reviewer who has said the same thing and asked the same burning question: Oh why oh why on such an otherwise fine stove did you have to make the burner knobs out of cheap (insert expletive of choice) plastic? And like many other reviewers, I searched in vain for a metal equivalent. You would think some entrepreneur with a 3D printer making metal parts for the automobile industry who had some down time would step up and make a few dollars on the side. But no. Oh well....

These knobs arrived promptly in pristine condition and were the exact replacement I needed. I can't in good conscience fault the seller for providing the only available (to the best of my knowledge) replacement part. So... four stars, leaving off one star in meaningless protest.

Now for some USEFUL information... Some reviewers mentioned that the knobs didn't fit because of a metal insert that prevented insertion onto the shaft on the stove top. It is quite possible that the metal insert from the broken original knob is still on the shaft on the stove top. When the plastic breaks, that metal "D" shaped insert almost always stays on the shaft as it is a snug fit. This piece is easily remove using common pliers, pulling gently, straight up. Also, I have discovered a way to fix the broken plastic shaft on the knob. I first make sure that the metal "D" shaped insert isn't still in the knob (it's ALWAYS remained on the shaft on the stove top) and then I simply superglue the broken bits together. Not having a clamp small enough to hold the parts together firmly, I use needle nosed pliers to hold the parts together for a precise amount of time, measured by whistling my alma mater's fight song 17 times. Finally, I reinforce the plastic shaft with a very small cable tie (aka zip tie). Viola! I've done this to the four out of five knobs that have broken, thank you very much Jenn-Air. (I am an unfathomable abyss of self righteous sarcasm. Please forgive me.) I plan on holding all five replacement knobs in reserve for when my jury rigged repairs inevitably fail, though it has been well over two years since the first knob broke. I hope this has been helpful.