Pinnacle’s hollow bars are designed to be drilled in and grouted through, leaving a steel reinforced grout column and anchor head in each borehole. These hollow anchor bars can be installed in any condition and are ideal for conditions that would normally be difficult for conventional solid bars. Pinnacle self-drilling anchors are available in a wide range of sizes. Pinnacle offers anchor bars in both “R” (round) and “T” (trapezoidal) thread design.