Parallel Set, Included Sizes 1 1/2 in, 1 1/4 in, 1 1/8 in, 1 3/4in, 1 3/8 in, 1 5/8 in, 1 in, 3/4 in, 7/8 in, Length 6 in, Maximum Size - Inch 1 3/4 in, Minimum Size - Inch 3/4 in, Number of Holes 2, Number of Pairs 9, Size 6 in x 1/4 in x 1 1/2 in, 6 in x 1/4 in x 1 1/4 in, 6 in x 1/4 in x 1 1/8 in, 6 in x 1/4 in x 1 3/4 in, 6 in x 1/4 in x 1 3/8 in, 6 in x 1/4 in x 1 5/8 in, 6 in x 1/4 in x 1 in, 6 in x 1/4 in x 3/4 in, 6 in x 1/4 in x 7/8 in, Thickness 1/4 in, Parallelism 300 micron in