These flipping weights are 97% pure tungsten, insert free and feature a sleek profile making it easy to penetrate the thickest, nastiest cover where the big girls live. Not only are WOO! Tungsten weights smaller and more sensitive than lead, they are also louder when they bang up against a flipping bead (sold separately) or a rock. And speaking of rocks, don't worry about the paint chipping off of this bad boy. It's powder painted to make it chip resistant.