The Rigid Base 6 are milled from solid blocks of aluminum to ensure a monolithic structure with predictable, superior strength hard coat anodized for protection and longevity. Bases are not cast or welded upon in any way to avoid unpredictable failure points.  The Rigid Base 6 has a textured, aggressive ground contact surface and 4 holes large enough to accept a 3” 16 penny nail for securing the bases to strongbacks and shoring lumber