1- Grab the V-bar cable attachment, thumbs up, elbows to sides, back straight and knees slightly bent.
2- Use triceps to extend arms with the bar down until it touches the front of your thighs level with your upper arm straight and stable next to body.
3- Return to the starting position until the forearm is close to upper arm, and repeat.
Tips and Advises:
1- The upper arms should always remain stationary next to your body and only the forearms should move.
2- keep your back straight.
Variation:
1- Triceps Pushdown
2- Triceps Pushdown - Rope Attachment