UPDATE - MY Error, I thought these were heavy-duty safety pins [I DID NOT read the title closely]. I was searching for heavy-duty pins and these popped up in my search. I have to compliment this company, immediately after placing my original 1-star review, the company contacted me to offer a full refund [they did NOT ask me to change my review or offer any perks!!!]. I also did not notice an issue with the points being dull as some reviews noted. For the thoughtful, and unexpected offer from the company to make my order acceptable, I am updating my review. The company was not aware I had already initiated a return with Amazon.ORIGINAL - I purchased these safety pins hoping they would be strong enough to hold medium-thick cotton material together. They will not, when the slightest pressure is applied to the cloth the pins will bend and come apart. They were the perfect size for what I needed, but the strength of the metal was sadly lacking. These would only be acceptable for very lightweight cloth.