Product review (5 stars): Great price and they get the job done.
Fit perfectly on my 8-year-old Lowe's 5-burner Propane Grill.  The old knobs were glued on and when the glue failed, they just spun around when trying to light the grill.  These are a slightly smaller diameter and different style than the originals, but provide a good grip and get the job done.