SW KELLY BAR · SINCE 2004 Foundation Drilling Solutions by Formation The right Kelly Bar and tooling combination depends on your geology. Explore our recommendations for hard rock, weak rock and loose soil. RECOMMENDED TOOLING Hard Rock (Granite) Interlocking / multi-locking Kelly Bar + roller-bit core barrel + rock auger. Learn More → RECOMMENDED TOOLING Hard Rock (Granite) Interlocking / multi-locking Kelly Bar + roller-bit core barrel + rock auger. Learn More → RECOMMENDED TOOLING Hard Rock (Granite) Interlocking / multi-locking Kelly Bar + roller-bit core barrel + rock auger. Learn More →