DUAL FUNCTION-Sink Strainer Plug can be used as a sink plug and filter at the same time. When working as a strainer, the 20 drain holes allow water flow quickly and catch food particles easily, protect your piping from unwanted accumulation of food waste and maintains good plumbing health When working as a plug, it will hold water in the sink. You just need to press the knob to fill sink, and lift it slightly to drain the water and collect all the resideues. . SMOOTH DESIGN-Sink stopper are all edge rolled, no sharp edges,keep your famlimies away from danger. They are also not easy to rust when used in hot water. Thesink basket strainer is 80mm diameter, fit for 79.3~80mm in diameter sink drain opening. NOTE: please make sure is the right size before purchasing. . UPGRADE MATERIAL-This kitchen sink plug strainer is made of high quality 304 stainless steel,copper and rubber, rust and corrosion resistance, well made and durable. We also increased the thickness of the sink strainer plug, so its more sturdy and durable. . EASY TO CLEAN-The drain strainer is suitable for drains and garbage disposal in the kitchen, wash basin, wash basin and workshop sinks, easy to install and easy to remove and clean. Can be reused after cleaning. .