Clockwork

SPI Steel Parallel, 9" Long x 1" High x 1/2" Thick, 0.0003" & 0.002" Parallelism, Matched Pair

SPI Steel Parallel, 12" Long x 1" High x 3/4" Thick, 0.0003" & 0.002" Parallelism, Matched Pair

SPI Steel Parallel Set, 8 Piece, 6 Inch Long, 3/4 to 1-3/16 Inch High, 1/8 to 3/8 Inch Thick, 52-58 RC Hardness, 4 Pairs

SPI Gage Block Bevel End Jaws, 6 Inch Length, 0.75 Inch Jaw Thickness, +/-0.00002 Inch Accuracy, for Rectangular Gage Blocks, Sold As Pair

SPI Steel Parallel, 6" Long x 3/4" High x 1/4" Thick, 0.0003" & 0.002" Parallelism, Matched Pair

SPI Gage Block Cylindrical Jaws, 2.945 Inch Length, 0.512 Inch Thickness, 0.5 Inch Radius, 0.00003 Inch Radius Accuracy, Pair

SPI Steel Parallel, 6" Long x 3/4" High x 3/8" Thick, 0.0003" & 0.002" Parallelism, Matched Pair

SPI Rectangle Steel Gage Block, 6 Inch, Grade AS-1, NIST Certified