High Quality: Made of high quality thicken stainless steel material, it is safe at most of the oven temperature. Highly Compatible: Suitable for many kinds of cookware lids, compatible for , Aldi, Lodge, and heavy dutch oven. Easy to Install: Our pot lid knobs are suitable for 6 mm lid mounting holes. The screws is easy to fix,just put the knob,rubber gasket and metal gasket correctly,and then use screw to tight them.