Catalog #: 2459931 Insert “B” 9172 Brass Comparison Holes
Catalog #: 2459946 Insert “C” 9172 Brass 0.25-inch Holes
Catalog #: 2459954 Insert “D” 9172 Brass Metric Comparison Holes
Catalog #: 2459968 Insert “E” 9172 Brass Misc Metric Holes
Catalog #: 2459979 Insert “F” 9172 Brass Metric Comparison Holes
Catalog #: 2459993 Insert “Z” 9172 Brass Blank