This is Fine Silver Bezel Sawtooth Serrated 3/16" size; 3.5mm wide; Best for easy draping over bezel, soft; For jewelers and students. Each lot is 20 continuous inches .In order to secure a gemstone, jewelry designers will often use a serrated silver bezel. The reason it is called "serrated" is because the bezel's edge contains tiny teeth or indentations that firmly grasp the stone instead of being smooth. For mounting soft gemstones or cabochons without facets, using a serrated bezel is especially useful because it gives a more secure hold than a smooth bezel. The bezel's silver construction provides a beautiful, reflective surface that accentuates the gemstone's beauty. Overall, a serrated silver bezel is a versatile and safe choice for setting gemstones in jewelry, and jewelers often use it to make beautiful and distinctive pieces.