I have just about every ruler out there and I only use 3 or 4 of them. I do use the Dresdyn plate one once in a while, so it was a good buy, but I bought so many Fon's and Porter rulers and have never had a use for them. I once organized my rulers and was amazed at how many doubles I had. I gave the second ones away when I shipped some fabric to a gal. I found a ruler I was just about to order. But I think I inherited that one from my deceased sister. So, maybe some of my doubles are from her. But if someone snuck into my house during the night and stole 3/4 of my rulers, I wouldn't miss them ever.