Small Hole Gauge Set Range 0.125 in to 0.5 in Contact Style Split Ball Included Gauge Ranges 1/8 in to13/64 in 13/32 in to 1/2 in 13/64 in to 5/16 in 5/16 in to 13/32 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 4 Overall Length 2 13/16 in to 3 1/2 in Case Type Vinyl Pouch Construction Tool Steel Includes Case Yes Locking Style Knurled Nut Maximum Measuring Depth 3 in