Product review (3 stars): What they are is plastic knobs that look like that, but they stretch
Necessary Evil. For the price, these should be some stainless steel or other metal knobs. What they are is plastic knobs that look like that, but they stretch, bend and break after wear. We pay for the compounds of metal, but don't have a choice of ordering metal. Only ever ending breaking plastic is available. Mine usually need to be replaced after around 2 years. I cook a lot. Crap knobs.