Each bed is bolted together with lag bolts. Each bolt-hole is countersunk, leaving a hole that hides the bolt. Some people prefer the look of plugs covering up the holes, which gives the look of the rail extending through the post (picture coming soon).
The plugs are very similar to the dowels, however instead of extending out from the post, the plug is built to be semi-flush against the post (they may stick out slightly from the post, but not much). Plugs are another very attractive add-on.
Unfortunately, plugs can not be added to our Hide-a-Bed Trundle or Underbed Drawers because they prevent the item from fitting under the bed. They can only be added to our beds that are made in-house (item numbers beginning in GT, FS or just a number with no letters at the beginning).