The website leadholder.com appears offline. My thanks to blog reader Paul for alerting me.
Leadholder was an online catalogue of thick lead leadholders – but also thin lead mechanical pencils and woodcase pencils devoted to technical drawing. It had a collection of historical catalogs that was a great reference for anyone interested in pencil history. The website was also a technical marvel, having many navigational features that were not commonly available back in 2001.