Features A. Passed ISO9001 &UKAS Certification B. Made of Aluminium bronze/copper C. Highly polished D. Explosion-proof,Non-sparking E. Anticorrosion F. Antifraying G. Surface HRC>25º H. Tensile strength range from 75-85N/mm2 I. Could grab and turn objects easily J. Back the tool up in the opposite direction and it will grab again K. It's able to work on many different shaped objects,such as square,round,hexagon,octagon,oval and even some irregular shapes L. Great for filter removal,pipe work,and holding pulleys Product specifications No. L(mm) L(inch) 01 600*100 24"