I purchased the Square to Circle by Uday. While I didn't expect industrial strength I did it expect it to last a few times. But after 10 tries one of the rivets broke (in the middle of my presentation!). While I was upset by the poor quality from the rivets Penguin was awesome and sent me a replacement. Literally the 2nd time I used it a rivet popped out again! Penguin was again awesome and offered to refund me and tried to go above and beyond in making it right. In the end I'm just disappointed in the very low quality of the square to circle. A better quality manufacturer of would be my recommendation.