Material: The lid knob is made of high-quality bakelite, the surface is frosted and non-slip, the screw is made of stainless steel, it does not rust, the finish is good, healthy and safe, the knob is fireproof, anti-scalding, non-slip, durable, strong and heat-resistant, it is a small helper for your kitchen utensils.Lid knob: You will receive a set of 2 black jar lid knobsEasy installation: The button is easy to install and use. Simply align the hole in the button with the hole in the pot lid and tighten the screws correctly in the order of the mushroom-shaped top balls, the pot lid, the plastic seal, the stainless steel seal, the base, and the screws. Universal: This pot lid knob is universal; it fits all types of pot lids with a hole diameter of 6 to 12 mm. Please measure the size of your pot lid and choose a suitable replacement knob handle before selecting.Application: This pot lid knob has a classic shape, is medium-sized, and comfortable to hold. It's a replacement handle for many types of pot lids in your home, such as kettles, wok pans, saucepans, etc., whether they are made of metal or glass.