Usage Tips:Features: These pot lid knobs are suitable for most kitchen lids, used to replace rusty or old knobs. COMFORTABLE TO HOLD: The base of the universal glass cover button is designed in the shape of an arc to fit the glass perfectly, and the handle is wide and thick and easy to grip, the design provides a good space between the button and the base (where it comes in contact with the cover), prevents the hot cover from burning your hands. Easy to install replacement buttons, the screws are easy to fix, just put the buttons, rubber washers and metal washers, and then tighten them with the screws. Our button covers are made of bakelite material, high temperature resistant, high friction resistance, insulating, sturdy and durable. Multiple Uses: The aftermarket knob is suitable for most lids, including kettles, pans, lids, etc.