Knipex 7-1/4" Cobra High Tech Pliers are easy to adjust at the touch of a button directly on the work piece, and have a comfortable handle width. The pliers are self-locking on pipes and nuts, and do not slip or require low hand force. They have special hardened teeth for low wear and stable gripping, and the box joint design ensures reliable catching of the hinge bolt and no unintentional shifting. The guards prevent the operator's fingers from being pinched, and the pliers are made of chrome vanadium electric steel and are forged and oil hardened. They come with a limited lifetime warranty against manufacturer defects and workmanship.