Starrett PT05251 - Penetrator - 1/4in (6.4mm) Ball Unit
The Starrett PT05250 is a penetrator – Ball 1/4in (6.4mm) for Starrett Hardness Testers. The indenter is compatible with Starrett Hardness Testers 3814, 3815, 3816, 3818, 3823, 3824, 3831, 3832.