The 4-in-1 Toddler Bed Conversion Kit will transform your Brooklyn Convertible Crib (Nursery Gray) or the Harper Convertible Crib (White)into a beautiful toddler bed for your growing child. Assembly is easy with their built-in-hardware. No loose screws or bolts mean it was designed and engineered with added safety since the hardware is pre-installed, so you just have to align and tighten! The rail provides the safety you want while still allowing easier access for toddlers and young children to climb in and out of bed.