Provides isolation from potential differences by means of the fiberglass isolation link in the tool. Designed to meet 5,000 lbs. OSHA requirements for fall restraint. Fiberglass section has solid foam core. Insulation / Isolation distance between metal castings is 6”. Can be used to secure the line workers safety belt or the worker may choose to attach a retractable lanyard or shock absorbing lanyard as the attaching device.