SKLZ Ball First Trainer - Golf Ball Striking Trainer Patented J-shaped trainer for developing actual ball-striking J-shape frames the ball-striking area and triangular markings focus club alignment, takeaway, and downswing Improves ball-striking consistency and precision Durable, impact-resistant, and flexible material rolls up easily to fit into golf bag Mat markers help to analyze divot and club impact Improves ball striking consistency and precision Maximizes distance and accuracy with iron shots Designed with durable, impact resistant material Includes built-in ball placement markers for consistent setup and works for right and left handed players, just flip over