TEXALAN 1 Pair 123 Blocks 1-2-3 Ultra Precision 0.0002 Hardened 23 Holes 0.0002''

Size within +/- .0002" Flatness and parallelism within .0002" Squareness on all sides is 0.0003" per inch Pairs are matched to a tolerance of 0.0002" Used for set-up, layout and inspection jobs Has 23 holes with 5 holes tap to 3/8-16 threads for clamping and 18 untapped holes Made of hardened tool steel and precision ground on all six sides Cross drilling design allows efficient use of lower weight with maximum strength Heat treat and hardness 56 to 60 RC 2 pieces per set Weight: 2.1 Lbs Precision ground cose hardened 1-2-3blocks-Five3/8"-16tapped holes are provided operation