Yes used them for many years best to have someone teach you ... "GAFFS" yes they're called "GAFFS"... NOT HOOKS! Old school cable guys call em' HOOKS... If you order them offline they are CALLED GAFFS!!!!!!!!!!!!!!!
Use your ladder man cause unless you have your own insurance dont touch them..If you fall from ladder that second rate compnay you work for should cover your medical...If you fall from GAFFS/ HOOKS! they will not be able to cover you