Aquaterior Pop up Drain with overflow features spring-loaded pop-up stopper, simply opens & closes by 1 press Durable & Anti-leakage - Made of stainless steel & brass with matte black finish; Thread design & 2 silicone gaskets for tight seal Reduces Clogging - With anti-clogging basket strainer inside for keeping out hair, dirt, ring Tool-free Installation - Features unique large square nut to easily screw & fasten without tools Brand Service - 5-year warranty brand service for any quality issues