Professional Quality, manufactured from chrome vanadium electric steel, oil hardened and tempered with smoothly ground jaws, joint faces and an accurately formed box joint Nine position adjustment The parallelogram-shaped gripping surfaces have specially hardened teeth to 61HRC for positive grip on pipes and nuts Plastic coated handles with slip guards for extra safety Has 'no-nip' feature which prevents handles locking together and damaging users' hands Sold loose This is a Draper product.