If it comes out the other side, you've gone too far.
Bone's harder than wood, lean into it. The skull's only a quarter-inch thick. Once you're midway through, drill in shorter bursts.
[SEP] Bone's harder than wood, lean into it. The skull's only a quarter-inch thick. Once you're midway through, drill in shorter bursts. [SEP] If it comes out the other side, you've gone too far.