The product features plastic rollers and is spring loaded. Clamp is required for installation, and is sold separately (Moen part number BR587 or 588). Designed to last use after use. Moen is dedicated to designing and delivering beautiful products that last a lifetime. Moen offers a diverse selection of kitchen faucets, kitchen sinks, bathroom faucets and accessories, and showering products. Moen products combine style and functionality with durability for a lifetime of customer satisfaction.