Each Susan Bates Silvalume® product undergoes a special anodizing process, which etches away all surface impurities, resulting in a velvet-smooth finish and a color that is pleasing to the eye. Once anodized, each Silvalume® Crochet Hook is polished for added smoothness. These crochet hooks have an "in line" angled throat, which will help beginning crocheters keep their stitches consistent.