All of the following are true about the use of a shackle except _____.
a. shackles with pins worn more than 10 percent should be replaced
b. a shackle pulled out at an angle has a reduced capacity
c. a shackle should never be used such that the pin can roll under load
d. when using a shackle with a hook, the shackle body should be hung on the hook
d. when using a shackle with a hook, the shackle body should be hung on the hook
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