There are two plays that I am going to tell you about.
The 47-Buck and the 38-Buck. The 47-Buck is where the 4-back runs the ball through the 7-hole. The wing is on the right side. Before the quarter back says, "Hike" the wing goes in motion, and blocks the defensive end.
The 38- Buck
The three-back runs through the 8-hole. The wing is on the left side and blocks the defensive end, just like the 47-Buck.