2-3-4 Blocks 23 Holes Matched Pair Hardened Steel HRC 55-62 Precision 0.0003in

2-3-4 Machinist set up blocksFeature:--Precision ground and case hardened to RC 55-62 on all six sides.--23 each 3/8 inch through holes (5 tapped with 3/8"-16 threads and 18 untapped).Description 2-3-4 Blocks Matched PairOverall size is within +/- .0002".Flatness and parallelism are within .0002".Squareness on all sides to within 0.0002".Pairs are matched to a tolerance of 0.0002".Package includes:2 x 2-3-4 Machinist set up blocks

• Robust and durable - Made of precision-grade tool steel hardened and precise ground on all 6 sides of block, heat treated and case hardened to HRC 57-62.
• 2 x matched pair 2-3-4 blocks set machinist.
• 23 holes consists of 5 tapped holes that are 3/8In-16for clamping and 18 tapped holes untapped holes.
• Accuracy with squareness on all sides within .0002 per inch.
• Cross drilling design gives minimum weight and maximum strength.