1.  The sling should be connected on the center of the hook, no hanging on tip.
2.  Forrbidden repairing crack by welding, forbiden correct reform by heat bending.
3.  When connect with tow slins, the angle between sling and hook centre line no more than 45 degree.

4.  Reject in case of heavy wear and tear.
5.  Make sure the clip coudn,t be loaded.l

6.  When using, not allowed side work, back work and tine work.

Reject the hook at following situation:
1.  The tear and wear of hook body more than 10 %.
2.  Crack could be found by both eyes or Nde check.
3.  The open size become bigger, the hook nose deform mor than 10 or any hurt to the hook body, dending and much tear and wear of the hook nose, and security clip can,t work well.