with radially extending gripping teeth circumferentially spaced around the bottom portion of the tooth wherein the attack angle between teeth and the spacing angle between adjacent teeth is selected so that substantially full penetration of at least one of the gripping teeth into the workpiece is achieved without interference from an adjacent tooth the lower jaw comprises a serrated upper surface comprising a semi circular scalloped configuration of a plurality of peaks and valleys the combination of the upper jaw and lower jaw configuration allows for increased gripping strength to be exerted on the workpiece and thereby avoid defects within the extruded workpiece application_number US 50234790 A description referring to fig2 an extrusion puller 14 is mounted on a lower guide means 26 and an upper guide mean 24 for movement along a run out table 16 from an extrusion press 12 it is well known to construct a pulling apparatus wherein a material to be pulled 18 is forced through the extrusion press 12 and gripped by the extrusion puller 14 the extrusion puller 14 is driven away from the extrusion press 12 along an extrusion axis a by a suitable drive means which may include a chain not shown beneath the run out table 16 and a chain connector 20 after the extrusion is completed the extruded material 18 is moved to a cooling table 17 by a belt conveyor 19 for further processing as seen in fig3 the extrusion puller 14 is guided along the pulling axis a by an extrusion puller mounting 22 the.