1-2-3 Block Set Built Tough For Milling, 5 Matched Pairs With 23 Holes, Pro Grade 0.0002 Inch Per Inch Precision, 1 X 2 X 3 Inch Hardened Tool Steel Jigs For Milling Machines

Premium 1-2-3 Milling Block Set for Precision Machining
✔️ 0.0002 in./in. accuracy, 5 pairs, hardened tool steel, 23 holes

These hardened 1-2-3 blocks are precision-machined jigs used to square and align parts on milling machines and other machine tools in shop setups.

✅ Material: precision-grade tool steel, hardened to HRC 57-62
✅ Size: 1 x 2 x 3 inches
✅ Precision: verticality within 0.0002 in per inch on all sides
✅ Holes: 23 total; 5 tapped 3/8-16, 18 untapped
✅ Pack: 5 matched pairs included

💡 What is a 1-2-3 block used for in precision milling setups? These handy blocks help quickly square and align components in mill work.

• Precise squaring of parts before milling
• Reliable edge alignment against fixtures or reference surfaces
• Checks for perpendicularity and parallelism in layouts
• Stackable for multi-point support during setup

✝️