General description The Kennedy Telescopic Gauge Set (6 Piece) features knurled satin finish bodies that provide positive adjustment of the hardened and radius ground plungers, ensuring accurate measurement of internal diameters when used with a micrometer. This set is ideal for measuring smaller diameters with the small hole gauge. Technical specifications Measurement Range: 8 - 150mm (5/16 - 6 inches) Includes gauges for sizes: 8-13mm (5/16 - 1/2"), 13-19mm (1/2 - 3/4"), 19-31mm (3/4 - 1.1/4"), 31-54mm (1.1/4 - 2.1/8"), 54-89mm (2.1/8 - 3.1/2"), 89-150mm (3.1/2 - 6") Number of Pieces: 6 Set Type: Telescopic Gauges System of Measurement: Imperial and Metric Compatibility and accessories Supplied in a size marked PVC storage wallet with stud fastening Other information