1/2 STEEL PARALLEL SET 4 MATCHED PAIRS
Made of high grade alloy steel, hardened and ground from stabilized stock. All are 6" long and 1/8" thick. All are within .0006" parallelism. Hardness 50-54HRC.
Here is what is included in the set:
1 PAIR 1/2X1X6 W, 5/16 HOLE
1 PAIR 1/2X1-1/2X6 W, 7/16 HOLE
1 PAIR 1/2X1-1/4X6 W, 3/8 HOLE
1 PAIR 1/2X1-3/4X6 W, 1/2 HOLE
WITHIN 0.0002 IN PARALLELISM
PAIRED 0.0002 IN HEIGHT
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