Copper Pop up Drain Stopper With Overflow-3-Years Warranty. This drain auger features a high-quality spring wire for excellent flexibility in tight bends. The design provides maximum thrusting action and even-through strainer crossbars.Brass Pop up Drain Stopper With Overflow-3-Years Warranty. This drain auger features a high-quality spring wire for excellent flexibility in tight bends. The design provides maximum thrusting action and even-through strainer crossbars.