AccusizeTools - 4 Pcs Small Hole Gauge Set, Half Ball Type, EG04-5001 Satin chrome finished, completely assembled with handles. Knuckled lock maintains the setting of the measuring arms to permit sizing with a micrometer or caliper. 0.125&#034; to 0.200&#034;(3-5mm) 0.200&#034; to 0.300&#034;(5-7.5mm) 0.300&#034; to 0.400&#034;(7.5-10mm) 0.400&#034; to 0.500&#034;(10-13mm)