Dasqua Ultra Precision 23 Hole 1-2-3 Block Set ~ Squareness is 0.0001″/1″. ~ Heat treated and case hardened to HRC 58-62. ~ Hardened and precision ground on all 6 sides of each block. ~ Tolerance of size +/- 0.0002″. ~ Parallelism 0.0002″. ~ Height of pair 0.0002″. ~ Cross drilling design gives minimum weight and maximum strength. ~ Supplied in a durable fitted ABS case. Squareness is 0.0003″/1″. Heat treated and case hardened to HRC 58-62. Hardened and precision ground on all 6 sides of each block. Tolerance of size +/- 0.0002″. ~ Parallelism 0.0002″. ~ Height of pair 0.0002″. Cross drilling design gives minimum weight and maximum strength.
