Easy to use. No tools required. . Comes with two sizes of silicone rings: 1.56, 1.65 to fits any standard sink drain. When to clean, simply pick up the hair catcher, and wipe off hair and debris. No more messes and chemicals to damage your drain. (Pls measure your drain before purchasing. Fits any 1.25 to 1.65 Wide tub drain and a depth of at least 1.2") [ Easy to Install ] No tools are needed, it can be installed easily with bare hands. You just take out the old bounce core and install a new bounce core. Anyone can install the pop-up drain because of its simple structure. If you want to use it for a larger sink hole diameter, you can use the rubber ring we included to increase the inner diameter of the sink plug. [ Premium Material ] The sink drain plug is mainly made of high quality stainless steel and thickened copper materials, sturdy, anti-rust, anti-cracking. With its good bounce and rebound strength, rapidly draining and quickly sealing water. Perfect Compatibility: Our universal bathroom sink stopper fits most sink drain holes. (inner diameter 32mm-42mm/1.25inch-1.65inch) So it can be used the washbasin, bathroom sink drain. Please be sure to measure the drain hole of the sink before purchase.