An operator wanted to improve steel bit design to increase erosion resistance, maximize the number of runs per bit body, and finish with a rerunnable or refurbishable dull condition in Marcellus shale, sandstone, and siltstone. Using a 12 1/4-in PDC bit with Aegis™ 3D-printed armor, the operator reached TD in test runs on four pads and achieved 10% higher average ROP compared with conventional bits on the same rig.