THE HOLDRITE® 117 Series NO-Hub Fittings Restraints are designed to reinforce no-hub cast iron installation in accordance with the installation instructions of U.S. Cast iron soil pipe manufacturers and the 2006 CISPI installation Handbook. The 117-R Series Restraints are for 2 to 8 in' fitting reducers and retain the fittings between the adjoining piping. All four stainless steel bands must be tightened 60 in/lb minimum.