Matched Pair 1 2 3 Machinist Blocks With 11 Holes From TINVHY For Precision Setup In Pro Grade Hardened Tool Steel Ground On All Sides To HRC 58 60 Ensuring 0.0001 Inch Squareness Great For Workshop Machining 2 Pack

Matched 1-2-3 Machinist Block Pair for Precision Setup
✔️ Includes 2 matched 1-2-3 blocks, 11 holes, hardened tool steel

These 1-2-3 machinist blocks are precision-ground, heat-treated tool steel blocks designed to provide repeatable, accurate references for setup and alignment in mills, drills, and surface grinders. They’re ideal for quick squaring checks, parallel alignment, and clamp-based setups in workshops and job shops.

✅ Matched pair blocks (1-2-3) with tolerance to 0.0002 inch
✅ Hardened tool steel, ground on all six sides to HRC 58-60
✅ 11 through holes (5 tapped 5/16-18, 6 untapped) for clamp versatility
✅ Flatness and squareness within 0.0003 inch; overall size within 0.00003 inch
✅ Pack includes 2 blocks for stable use outside a vise

💡 What is a 1-2-3 machinist block used for in precision workshop setups?

These handy blocks provide a simple, reliable reference for alignment and squareness in daily machining tasks.

- precise 1-2-3 block reference for squareness and parallelism - handy for milling, drilling, and setup work in a shop - hardened tool steel with six-sided ground surfaces for durability