Ideal for micro burr removal, internal cleaning, rust removal and surface preparation. Kits contains 12 brushes. Available for both decimal and metric hole sizes. The inch kit includes .032, .047, .054,.079, .094, .109, .125, .142, .156, .172 and .189 sizes. The metric kit includes 1mm, 1.5mm, 2mm, 2,5mm, 3mm, 3.5mm, 4mm, 4,5mm, 5mm, 5.5mm, 6mm and 6.5mm sizes. Also included with this selection is our premium double end pin vise which provides a safe and secure means of using the brush.