The Double Bed Rail helps kids make the transition from crib to bed easier by keeping them secure. Unique double-sided design allows parents to use the bedrail regardless of where the bed is located in the room. Double-sided is often a safer choice as well. It is easy to install with minimal assembly requires and no tools needed. Fits twin to queen beds. Requires a box spring. 48"L x 1"W x 20"H.