Some reviewers find the urethane to be a bit soft, but in fact it's almost perfect. Not hard enough to damage things I want to clamp, but strong enough to hold its shape and not get damaged. I have a 4.5" wide vise so I used that for curly items and also these https://smile.amazon.com/gp/product/B078MVLSZS/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=16" models waffle pattern for general use . The magnets on both appear to be very good - much better than the old model ribbon magnet they replace.