4 and 6 Hole Egg Nests

Are these role out style nesting boxes? And can the eggs be retrieved from outside the pen.
The 4 and 6 Hole Nesting boxes (sku's #5BEN4 and 5BEN6) are not roll-out style. The eggs will remain in the nest box and not roll out into a collection basket. If you mounted the 4 Hole or 6 Hole nest boxes on an exterior wall, you could devise a trap door on the outside to collect the eggs through.

What is the size of the nest box where the hen lays her eggs
Each hole opening is approximately 7" H x 11.5" W x 12" L.

Are the bottoms removable and easy to clean?
The assembly for the 2,4 and 6 Hole Egg Nests are with nuts and bolts so you can take them apart to clean them.