Dasqua Ultra Precision 23 Hole 1-2-3 Block Set – 8407-0005

• 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.
• Supplied in a durable fitted ABS case.