The HeadLOK flat head fastener is a heavy-duty structural wood screw requires no predrilling and offers higher design shear than 3/8" lag screws. HeadLOK zips right in and creates a great finished look.
Attaching rigid foam (SIPs)
And so much more!
3/8” lag screw replacement
Flat head provides great finished look
The SpiderDrive™ System contains eight points of contact, maximizing bit fit and reducing stripping.
Sharp gimlet point for fast installation into wood and OSB
Aggressive thread for holding and withdrawal strength