Folding and quick installation : Our toddler bed rails are pre-assembled. Just connect the support base rod and the U-shaped base and fix it to the bed. It can be installed in 2 minutes. No complicated parts assembly is required, and the folding design also makes it easy to store. Sturdy and stable U-shaped base : The new upgraded Kids' Bed Rails & Rail Guards has a large U-shaped base with a depth of 14 in, which is better embedded under the mattress, has a larger force area, increases stability and safety, does not shake easily, avoids sliding and shifting, and parents are more at ease with their babies falling asleep. F-tube fits the bed at 0 distance: F-pressure tube is installed.