Tool installation: easy to install with no special tools required. Just twist the button onto the toilet water tank by hand. Durable materials: the flush button is made of quality ABS plastic and features a 314 stainless steel spring for reliable performance. Dual flush control: the button design provides a choice between semispring and fullspring mode, allowing you to select the flush intensity that suits the need. Broad compatibility: the twobutton design can be applied to onepiece toilets, twopiece toilets, and squatting toilets. Easy to use and reliable: designed for straightforward operation and dependable performance in everyday use. Use scenarios Home renovation or replacement: install in standard residential toilets to aging or faulty flush buttons with a durable, easytouse dual flush control. Shared spaces and properties: suitable for hotels, rental apartments, or offices where different toilet configurations exist, providing a consistent user experience across fixtures. installations or upgrades: ideal for upgrading older cisterns to a modern dual flush control, improving usability and function across various toilet types.