These are essential for finishing those wall mounted bookshelves. They are durable, strong, easily inserted and relatively inexpensive. I was dissappointed not to find them commonly available in the local brick-and-mortar hardware stores. Fortunately they are available on-line! The seller was very prompt in mailing. Huge relief to finish this project.

These are kind of spendy at $10pr for basic welded wire bookends, but they do the job nicely. I think the scarcity of these contributes to the high price.