Ultra Precision Machinist Block Set 1x2x3 With 23 Holes For Milling Machines, Matched Pair, 0.0002 Inch Tolerance, Heat Treated Tool Steel Hardened To HRC 57 62, Ground On All Sides, Cross Drilled For Strength, Two Pack

High-accuracy 1x2x3 Machinist Block Pair with 23 Holes
✔️ Ground on all six sides, heat treated steel, 0.0002 in tolerance

These precision machinist blocks are hardened tool steel blocks used for precise setup and reference in milling machines and metalworking benches. This two-pack matches pairs for consistent alignment.

✅ Two-piece matched pair 1-2-3 setup blocks for easy stacking
✅ 23 holes total: 5 tapped 3/8-16 for clamping, 18 untapped
✅ Hardened tool steel, heat treated to HRC 57-62, ground on all six sides
✅ Cross drilled design reduces weight while maximizing strength
✅ Tolerances 0.0001-0.0002 in for square references

💡 What is a precision machinist block set used for in milling and setup? Here's a handy overview of why machinist blocks matter. - Handy for establishing square references on mills and benches - Improves repeatability of setups with tight tolerances - Useful for fixture alignment and part inspection