TrussLOK-Z is a fastener engineered for joining two-, three- and four-ply girder trusses. TrussLOK-Z requires no predrilling and is engineered for single-sided installation. The thread length is correct for dimensional lumber, eliminating board jacking and pulling trusses together during installation. TrussLOK-Z can also be used with 1 1U2" thick LSL and LVL truss chords.