Today I purchased a 20 1/2 inch sq Omnigrip ruler at Joann's. When I got it home I discovered one corner was chipped. Which meant a return trip to exchange it. They had 5 of these rulers in stock and I found that 3 of them were also damaged in the same way. Luckily I found one that was good and they exchanged it very graciously. I did take the other damaged ones up to the customer service counter, I hope they don't just put them back in stock. Anyway lesson learned - always check carefully before leaving the store. This is the first Omnigrip rule I have purchased - has anyone had a problem with the corners chipping on this brand?