Professional Quality manufactured from chrome vanadium electric steel oil hardened and tempered with smoothly ground long pattern jaws joint faces and an accurately formed box joint with safety stop. The extra slim head and joint area ensure an ideal access to the workpiece in confined working spaces. The parallelogram-shaped gripping surfaces have specially hardened teeth to 61HRC for positive grip on pipes and nuts. One hand press button adjustment. Plastic coated handles. Has 'no-nip' feature which prevents handles locking together and damaging users' hands. Display packed.