-Made of high quality steel

-Hardness: HRC55-62

-Accuracy: 0.0002" Parallelism in height, ±0.0002" to size in height

-Includes 9 pairs: 6"(Long) x 1/4"(Thickness) x High:3/4",7/8",1",1-1/8",1-1/4",1-3/8",1-1/2",1-5/8"