Required to attach additional rails to the booster seat.
These long quick-release screws are used so that additional rails can be mounted on the booster seat. They are simply replaced with the standard screws for the seat attachment. The screw head is made in a handy shape so that the screw can be screwed in by hand without tools. The length of the thread is 65mm.
The quick-release screw is required so that an additional rail can be fitted to the booster seat. This is simply replaced with the original screw.