Ames makes and sells ball penetrators and diamond penetrators for all of our standard and portable hardness tester models. Ball penetrators come in 1/16″ for B, F, G and T scales. 1/8″ for E, H, K and W scales. 1/4″ for L, P, M and X scales. 1/2″ for R, S, V and Y scales. Diamond penetrators come in standard for A, C and D scales and superficial for the N scale. Diamond penetrators have a 120 degree cone and spherical point.