Suburban Tool B-123-H11-M 1-2-3 Block Set Hardened Metric Holes

The Suburban Tool B-123-H11-M is a matched, hardened pair of precision 1-2-3 blocks featuring 11 metric threaded holes per block, manufactured in the USA by Suburban Tool, Inc. of Auburn Hills, MI. Each block measures 1 in x 2 in x 3 in and is ground on all six faces to tight parallelism and squareness tolerances, providing reliable reference surfaces for fixturing, setup, and inspection on surface plates and in milling vices. The 'H' designation in the part number indicates hardened steel construction, and the 'M' suffix confirms metric threaded holes throughout, making these directly compatible with metric clamping hardware and workholding accessories. The matched pair is supplied new in a fitted wooden storage box to protect ground surfaces, consistent with Suburban Tool's standard packaging for this model. These blocks are suitable for use as setup references, edge-finding aids, and workpiece supports in precision machining and inspection environments.

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