Execution: Ground contact surface, blued. Non-stepped, for turning individual clamping diameters. Finely machined contact surface, unblued. Note: Jaw inserts made of aluminum, available upon request. Use: Since the jaws can be changed or adjusted to the desired diameter within seconds, it makes sense to have several jaw units ready for use at the machine. This minimizes setup times. The jaw units consist, for example, of several sets of base jaws with non-stepped soft jaw inserts that are turned to the desired diameters. This rationalization effect is essential not only for CNC machines but also for any lathe. Designed to screw onto hardened base jaws. For clamping operations of irregularly shaped or already machined workpieces that must not be damaged. The jaws are machined according to the shape of the workpiece.