Beadsmith BUR10 10-Piece Diamond 150 Grit Tip Drill Bits for Engraving, 2.35mm This item is a BeadSmith 10-Piece Diamond-Tip Drill Bits For Engraving - 150 Grit/2.35mm Shanks Purpose of use for Arts, Crafts and Sewing, Jewelry Making This product is manufactured in United States