Visual Inspection must be replaced immediately.
There must not be evident rust, weld spatter, deep crack
or groove on hooks.
Inspect whether chemicals are damaged, deformed, cracked
or the unbent hooks are twisted at over 10° from the surface
or crack, in order that their hasps can wind around the hook
tips.
If the hook opening is over large, it means the hoist is misused or
overloaded. The damages to other bearing components of the hoist
must be inspected.