- Heat treated and precision ground.
- Parallel to .0003 on all sides.
- Up to .0003 over allowance for nominal lapping.
- Standard blocks have 23 holes; 5 holes tapped 3/8-16, 18 drilled through. Blocks with no holes are also available.
- Sold in pairs.
- Standard sets are supplied in a cardboard box. Wood box available at an additional cost.
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