3 STEP

For an outside shaded DL:
1) inside foot, short powerful step, get lower than OL, strike with inside hand on OL #s
2) outside foot, in combination with outside arm, plant and get control of OL outside shoulder
3) inside foot past OL, heel to heel (inside DL's heel outside OL's heel), simultaneously rip or swim with inside arm.

On obvious passing downs, no need for first step.
Try Rex Ryan's book on the 46 for a detailed explanation.