HeadLok Structural Screws

The Headlok was designed to be a multi-purpose construction lag screw, great for securing blocking, temping up framing members, and securing non-structural joints. 

It differs from a Ledgerlok in its slight smaller shank making driving easier, and shorter threaded section more suitable for sucking frame pieces together.

4" and 6" screws have a 5/8" diameter head with a T30 drive.