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Feature: 23 holes include 5 holes tapped to 3/8-16 and others untapped, cross drilling design allows for efficient use of lower weight with maximum strength.
Accuracy: Squareness: 0.0003"; Parallelism: +/- 0.0003"; Height accuracy in pair: +/-.0003".
Material]: Made of precision-grade tool stainless steel hardened and ground on all 6 sides of block, heat treated and case hardened to HRC 56-62.
Application: Perfect for machinists, woodworkers, metalworkers, and more.
Package Includes: 1 * matched pair 2-3-4 blocks.
Feature: With 23 Holes Squareness: 0.0003"/1" Parallelism: ±0.0003" Height accuracy in pair: ±0.0003" Hardness: HRC 56-62 Finished from 6-16 micro inches 5 holes tapped to 3/8-16 and others are untapped Precision ground on all sides Squareness on all sides Surface finish Oversize to allow nominal tapping Package Includes : 1 * matched pair 1-2-3 blocks