FastenMaster FMTSZ278-50 TrussLOK-Z Multi-Ply Girder Truss Fastener, 2-7/8 Inches, 50-Count Built up underside of head effectively eliminates snapping during installation Prevents gapping or cupping between plies, which can occur in nailed applications Engineered for use in LSL and LVL truss chords and dimensional lumber Free driver bit in every package American made