The P17 Custom Fairway Woods (Ping® K15™ style) have oversized faces with an extended profile that moves the center of gravity further behind the face.
By moving the center of gravity to the rear of the head the design promotes a higher launch angle with a reduced spin rate for a longer and straighter shot.
Also the the predominate amount of interior head weight is placed toward the heel of the club head to promote a draw shot or to help to fight a slice.