Adjustable Parallel Set, Included Sizes 1 3/4 in to 2 1/4 in, 1 5/16 in to 1 3/4 in, 1/2 in to 11/16 in, 11/16 in to 15/16 in, 15/16 in to 1 5/16 in, 3/8 in to 1/2 in, Maximum Size - Inch 2 1/4 in, Maximum Size - mm 57 mm, Minimum Size - Inch 3/8 in, Minimum Size - mm 9.5 mm, Number of Pairs 6, Range - Inch 3/8 in to 2 1/4 in, Range (mm) 9.5 mm to 57 mm, Case Type Plastic Pouch, Includes Case Yes, Length 1 5/8 in to 4 7/8 in, Parallelism +/-0.001 in, Tolerance -