The 4 inch brushed bronze square grid pattern drain cover is designed for use with any Everbilt waterproof shower pan. The integrated shower drain and shower drain covers are manufactured with 304 stainless steel which has a higher corrosion resistance than regular steel and is widely used because of the ease in which it is formed into various shapes. Also, 304 stainless steel is built not to rust, making your shower drain and shower drain cover very durable, ensuring a long life. Thus, the shower drains can easily screw into the shower pans for quick and easy installation. Additionally, these shower drains are adjustable in order to fit varying tile heights & thicknesses from 5/16 inch to 1/2 inch. The square grid pattern design is modern, yet practical. The drain cover is also smooth to the touch and won't hurt your skin. Very easy to Install!.