Schwenk OSIMESS 627 00003 Split Ball Bore Gauge Sets for blind bores Nominal range 4.5-12mm effective range 4,15 - 12,50mm number of probes 13, Holder with retraction Model OS, Hard Chromed, Indicator not suppliedSplit ball probes OSIMESS For fast manual measuring of bores with from 1,0 to 40 mm. Modular system with one instrument holder which can quickly be adapted to the diameter range required with exchangeable split ball probes and measuring needles. The deviation of the measuring travel is via a precisely manufactured wedge needle out of tungsten carbide. The three basic designs are hard chromed, alternatively carbide tipped or for blind bores. Cost