0.0003 Squareness Per Inch, Hardened Steel, 2-3-4 Block with 23 Hole Setup Block 0.0001 to 0.0007 Inch Overall Tolerance, 3/8 - 16 Inch Tapped Hole Size, 56-60 HRC Hardness, Sold As Matched Pair (Pkg Qty=1)
Item not returnable!
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