The new Strong-Drive 3" Flat Head Variable Thread Yellow Zinc Screw Strip (WSV3S) has been developed for fastening subfloor sheathing using the Quik Drive auto-feed screw driving system. The holding power of these screws reduces the gaps between the joist and subfloor that causes a floor to squeak. A newly redesigned tip and thread pattern provides easy starts and up to 25% less torque while driving. The Strong-Drive WSV Subfloor screw is the only fastener to be dual-evaluated under ICC-ES AC233 and AC120 for wood-frame subfloor fastening.