The Flam Rudiments consist of two single strokes by alternating hands. The first stroke is a quieter stroke (often called a grace note), which is closely followed by a louder primary stroke from the opposite hand. The two notes are almost played simultaneously and are intended to sound like a broader single note when performed.  The Flam Rudiments include:

Forty Rudiments

Roll Rudiments / Diddle Rudiments / Flam Rudiments / Drag Rudiments