Small Hole Gauge Set, Range 0.125 in to 0.5 in, Contact Style Split Ball, Included Gauge Ranges 1/8 in to 5/32 in, 13/32 in to 1/2 in, 13/64 in to 5/16 in, 5/16 in to 13/32 in, 5/32 in to 13/64 in, Maximum Measurement - Inch 0.5 in, Maximum Measurement - mm 12.7 mm, Minimum Measurement - Inch 0.125 in, Minimum Measurement - mm 3.2 mm, Number of Pieces 5, Overall Length 2 in, Case Type Vinyl Pouch, Construction Steel, Includes Case Yes, Locking Style Knurled Nut, Maximum Measuring Depth 1 in