HIGH-QUALITY MATERIALS: Made of high-quality stainless steel combined with PP material, high temperature resistant, high friction resistant, insulating, anti-rust, easy to clean and dishwasher safe, sturdy and durable for long-term use.WIDELY APPLICATIONS: The universal kitchen cookware lid suitable for many kinds of cookware pot lid covers, such as kettle, oil pot, frying pan, saucepan lids, Casserole Glass Lid Pot, rival crock pot lid, ideal replacement for the old and damaged knob of pan lids, energy saving.EASY TO INSTALL: We give a free screwdriver for each set of products and each knob contains 1 silicone gasket and 1 stainless steel washer for pot and pan covers. The screws are easy to fix, just place the knobs, rubber washers and metal washers correctly, then tighten them with the screws.SIZE INFORMATION: Each pot lid knob ergonomic designed shape. The size is approx. 5.5 cm/ 2.2 inches in base diameter, 4.5 cm/ 1.8 inches in upper diameter, 3.0cm/ 1.2 inches in total length, the screw size is approx. 2.0 cm/ 0.8 inches in length, proper size for comfortable gripping and help protect your finger from heat.