This Boley style jewelers sliding gauge gives quick measurements of inside or outside diameters in millimeters. You can even measure mounted stones! Made of stainless steel it can measure 0-100mm; features knurled locking screw, notched jaws and Vernier gauge.
- Made of stainless steel
- Notched jaws for inside/ outside measurements
- Can measure mounted stones
- Locking screw and thumb slide
- 0-100mm Vernier gauge
- Size: 5-3/4" inches (145mm)