The Low Boy Rollout makes it easy for overnight guests to access their trundle bed. This low-lying mattress support has a no-pop design for a stationary surface. Designed for maximum strength and safety the low boy rollout stands on four smooth-rolling locking carpet rollers that are safe on your floors. Dual 1” x 1” cross bars for added support and angle up side rails to help retain the mattress. Quality construction at a promotional price!