Instructions:
1). The design and manufacture of the travelling hook blocks confirm to API Spec 8A;
2). Integrated design of travelling block and hook body, small overall size and compact structure;
3). The surface of pulley rope groove is hardened to provide long wear resistance;
4). The main bearing parts are made of high-strength alloy steel cast or forged and welded, and have passed non-destructive testing;
5). The hook can be 360 ° rotation and position lock.
