Pro Grade 1 By 2 By 3 Inch Precision Blocks Set With 23 Holes 5 Tapped To 3/8-16 And 18 Untapped Includes Screws And Hex Key Hardened Tool Steel 56 60 Rc Ground On All Sides Heat Treated 0.0001 Verticality 0.0003 Tolerance 0.0002 Parallelism

Precision layout blocks set for 1x2x3 inch machining
✔️ 23 holes total, 5 tapped 3/8-16, 18 untapped, includes screws & hex key

This precision block set is designed for accurate setup, layout, and inspection in metalworking and manufacturing environments. It features cross drilled design to reduce weight while keeping strength and six-sided ground surfaces for repeatable clamping.

✅ Hardened tool steel, heat treated to 56-60 Rc, accuracy ground on all six sides
✅ 23 holes total; 5 tapped 3/8-16, 18 untapped
✅ Cross drilling design reduces weight while maintaining maximum strength
✅ Verticality 0.0001 in; dimension tolerance 0.0003 in; parallelism 0.0002 in

💡 What is a precision layout block set used for in metalworking and inspection? This handy tool helps you align and verify parts precisely.

• Helps establish reference surfaces for setup and inspection
• Enables repeatable clamp points via tapped holes
• Assists in verifying squareness and parallelism during fixture construction