Precise 81 Piece Square Steel Gage Block Sets Each block has a threaded center hole. Made of the highest quality tool steel. Surface hardness is HRC 64. Meets or exceeds U.S. Federal specification GGG - G - 15C. Complete with manufacturer's calibration or
Precise 81 Piece Square Steel Gage Block Sets
9 blocks.1001-.1009″ with a step of .0001″
49 blocks: .101-.149″ with a step of .001″
19 block: .050-.950″ with a step of .050″
4 blocks: 1.000-4.00″ with a step of 1.000″
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