Perfect compatibility: Their sink strainer can be used for 99% of sink drain holes. No matter basin, bathroom sink drains or shower bathtub drains, it can work with all. This bathroom sink drain stopper has a pop-up design that gently presses the top cover to switch between 2 modes - stopper (to keep the water) and strainer (to drain off the water). The tub stopper pop-up design overturns the traditional, inconvenient sink stopper! Built-in anti-clogging filter basket inside that is much thicker and stronger than the ordinary regular push-button drain plug. The basket of bathroom sink stopper could collect things, not only provides effective anti-blocking and fast water flow but also prevents the loss of valuables, such as jewelry, rings, etc. When the sink plug needs to be cleaned, just take out it, rinse it and wipe it clean. Due to the sink stopper's simple structure, you can easily install this bath plug without tools, just take out the old one and insert the strainer core to complete the installation. Note: Please be sure to measure the drain hole of the sink before purchase.