User blog comment:CROWMETA13/What is Sam and Crowley plan in s11e9/@comment-3481504-20151122105042/@comment-3481504-20151122114148

If death's ring didn't disintegrate with him and his scythe, then yeah, Crowley and Sam could use them, but the cage can definitely not be opened/closed with the rings, that is unless the writers are going to continue to contradict themselves.