Introduction
As the name states this has an internal pin within the hexagonal socket with requires a special insert bit or key wrench to insert and remove. This reduce the risk of tampering by thieves or intruders undoing the screw. Due to its 2 way reusable fixing capability this is useful security screw where maintained is required. Also these security screw can only be accessed by authorised personnel with special tools.
Application – Window Grill, Light Fixture Train And Buses, Prisons Etc.