STANDARD RAM - MEDIUM SIZE The single-stage standard ram series is completely matched to each other with sizes and extension lengths. The smaller ram creates an opening into which the next larger ram is then inserted The R 412 has an extended length of 1180 mm. This means a minimum overall height with comparatively large stroke. The claws can be rotated through 360°. Sensitive operation at the star grip is possible without turning the wrist. The easy-grip claws on the piston rod and in the cylinder base provide a secure grip on sloping and smooth surfaces.