Muscle Group: 

Grasp a dumbbell in each hand and lay on an incline bench set at a 45 degree angle.

Keep your feet flat on the floor and your back against the bench at all times.

Using a hammer grip (with your palms facing each other), lift the weights to shoulder height on either side of your chest.

Extend your arms fully and press the dumbbells up.

Slowly return the dumbbells to the starting position at the sides of your chest.