What are we pinning?!! LOL! I'm such a non-pinner, but I would be afraid to sew over them. If the needle hit them wouldn't it make a huge noise and break your needle? And what about the stick part of the pin impaling your eye and eye juice getting all over your fabric? And not to mention the horrid eye injury. Okay, maybe that's a little dramatic. But we need our eyes! You pin sewers be careful. I'm going to worry about you now... Instead of pinning, just "eyeball" it! LOL!