Five Pair 1-2-3 Blocks Set With 23 Holes For Precision Machining, 0.0002 Inch Squareness, Hardened Tool Steel Machinist Jig, Milling Fixture Featuring 5/8-11 Tapped Holes And 18 Untapped Holes For Secure Clamping And Flexible Setup

Five Pair 1-2-3 Block Set with 23 Holes for Precision
✔️ 23 holes total: 5 tapped 5/8-11 and 18 untapped for secure clamp

Five Pair matched 1-2-3 blocks are precision metal fixtures used to square, align, and clamp parts on mills, drill presses, and fixtures. They provide repeatable reference surfaces for accurate setups in machining workholding.

✅ Precise ground and case hardened tool steel on all six sides
✅ Overall size within 0.0003 in. with flatness and parallelism
✅ Squareness on all sides within 0.0003 in
✅ Matching pair tolerance 0.0002 in between pairs

💡 What is a precision 1-2-3 block used for in metalworking fixtures? These handy blocks provide a reliable reference for squaring and aligning parts in mills and fixtures. - precise reference surfaces for milling and jig setups - handy tool for maintaining square relationships between parts - matched pairs ensure consistent alignment across fixtures - durable hardened tool steel for long service life