Groz Bcord100 Brass Caliper Calipers Brass Touch Up Brushes 177 Pieces Replacement Packs 177 Pieces Replacement Packs Available Part # Size Pack Qty C177 1 1 2 x 3 32 WK2 12 C177 2 1 2 X 1 8 WK3 24 C177 3 5 8 x 1 8 WK5 24 C177 4 5 8 x 5 32 WK6 12 C177 5 3 4 x 1 8 WK7 12 C177 6 3 4 x 3 16 WK9 12 C177 7 3 4 x 5 32 WK8 12 C177 8 7 8 x 3 16 WK11 12 C177 9 1 x 3 16 WK13 12 C177 10 1 x 1 4 WK15 12 C177 11 1 1 8 x 3 16 WK16 6 C177 12 1 1 8 x 1 4 WK18 6 C177 13 1 1 4 x 1 4 WK21 3 C177 14 7 8 x 1 4 WKA 6 C177 15 1 1 8 x 5 16 WKC 6 C177 16 1 1 4 x 5 16 WKD 3 C177 17 1 1 4 x 3 8 WKE 3 PALR03EG 4B AAA Battery Evolta Alkaline (4 Pack) who need to take measurements on small objects such as nails screws lenses tubing etc 1mm on the metric scale