KEENEY's TruDrain bathroom sink grid drain incorporates patent-pending technology that improves drainage performance by up to 40%. TruDrain's unique concave design promotes water flow toward the center of the drain, enhancing drainage and preventing ponding. With the plumbing professional in mind, we've made TruDrain easy to install, including a putty-less washer, TPR basin washer, and heavy-duty locknut with large wrench flats. It is available for sinks with and without overflow and features a 1-1/4 in. standard outlet pipe that fits sink drain holes at least 1-1/2 in. in diameter. The elevated finish and solid brass construction provide long-lasting durability. You can install with confidence knowing KEENEY stands by this product with a Limited Warranty.