1-2-3 Deluxe Block Set

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Used in layout and setup work. Each set consists of 2 matched,
hardened and precision-ground blocks. The squareness on all sides
is within .0001” per inch. The blocks are supplied with a plus allowance
of .0001” to .0003” to allow nominal lapping. Five 3/ 8”-16 tapped
holes are provided for clamping. 5 stainless steel socket head 3/ 8” - 16
cap screws, one hex key in a plastic fitted case.