Expert Quality, for measuring of bore diameter and groove width. The spring-loaded plunger expands within the hole. Knurled locking screw allows plunger contacts to be held in position, removed and measured with a micrometer. Satin chrome finish. Supplied in PVC storage wallet with ranges marked.Contents:
•   Gauge range: 8-13mm (5/16 - 1/2") Length: 115mm
•   Gauge range: 13-19mm (1/2 - 3/4") Length: 115mm
•   Gauge range: 19-31mm (3/4 - 1.1/4") Length: 115mm
•   Gauge range: 31-54mm (1.1/4 - 2.1/8") Length: 145mm
•   Gauge range: 54-89mm (2.1/8 - 3.1/2") Length: 145mm
•   Gauge range: 89-150mm (3.1/2 - 6") Length: 145mm