87 51 250 KNIPEX Cobra® ES Particularly good access to the workpiece due to very slim construction of head and joint area. Long, narrow jaws with front gripping serration: longitudinal gripping profile for round parts such as screws and bolts. Ideal for service, maintenance and equipment repair, in automotive and general industry. Firm grip also on flat material due to three-point rest. Cross groove for holding slender round materials such as nails. Fine adjustment for optimum adaptation of the gripping capacity and ergonomic grip position. Push the button for adjustment on the workpiece. Self-clamping on pipes and nuts: no slipping on the workpiece, effortless working. Box-joint design for high stability due to double guide. Reliable catching of the hinge bolt: no unintentional shifting. Pinch guard prevents operators' fingers being pinched. Fine adjustment for optimum adaptation of the gripping capacity up to width across flats of 36 and pipes up to ⌀ 40 mm. - Adjustment positions: