- One of a comprehensive range of Premier Hand Tools, suitable for daily professional use. - Manufactured from hardened and tempered drop-forged Chrome Vanadium steel. - Finely ground polished head. - Unique teeth design and diamond shape jaws increases torque and grip on round, flat, square and hex shapes. Induction-hardened to 55-65 HRC. - Dual material comfort grip handles and black oxide finish for corrosion resistance. - Lifetime guarantee*.