| Code | Dim. | STEP |
| RMS-G |  |  |
| RMS-GS | | |
RMS-G is a grip model with two HSS pins that penetrate into the workpiece, leaving tiny marks on it. The friction is much higher than that of using the standard serrated jaw, against soft steel the friction co-efficient factor is up to 0,8.
Model RMS-GS has one grip jaw and one smooth jaw.