2 Pack 2 4 6 Machinist Blocks With 23 Holes Matched Pair Precision Set Up Blocks For Milling Machines Ground On All Sides To 0.0002 Inch Tolerance Hardened Tool Steel HRC 57 62

2-Pack Precision 2-4-6 Machinist Blocks, 23-Hole Set
✔️ 2-piece matched set: 2-4-6 blocks, 23 holes, hardened tool steel

These precision machinist setup blocks are designed for milling, drilling, and inspection work. Ground on all six sides for true squareness and reliable clamping in jigs and fixtures.

✅ 23-hole grid with 5 tapped 3/8-11 holes for clamps and 18 untapped holes
✅ Ground on all six sides to 0.0002 in per inch accuracy
✅ Hardened tool steel, heat-treated to HRC 57-62 for durability
✅ Cross drilling design reduces weight while keeping strength

💡 What is a machinist setup block used for? - handy reference surfaces for squaring blocks and fixtures - helps transfer dimensions and ensure precise alignment during milling or drilling - improves repeatability in jigs, vices, and inspection setups