I 'be gone for awhile but have been working at this and that however I would like to improve my tools over exacto knives , pocket knives and sharp awls ,although I have been successful and pleased with my horns,there is room for improvement for me,I am thinking of going the metal graver rout,these seem like a good tool for our art,what you ? Good idea? I also found some large upholstery needles at Walmart ,four of them range from 6" to 12" at .$ 3.49 I think they could be successfully reworked into scrimshaw and graving tools with added handles,made in "Czech Republic with European quality"by Dritz of long time sewing fame,,I am also not adverse to using my checkering tools .anyway are metal graders worth buying and is the sharpening and angles the same? Source?