The Strong-Drive® SDPW Deflector screw from Simpson Strong-Tie fastens non-load-bearing, full-height partition walls to trusses and joints in roof and floor systems. Easy to install, the SDPW is designed to compensate for vertical deflection in the joist or truss due to live load or to seasonal material contraction and expansion. With tested lateral-load ratings that meet building code requirements, the SDPW is value engineered for strength, installation speed and jobsite safety.