Product Description Learn how to swing in tempo and on plane every time with the GolferDoc Brand men's dual-hinged 5 iron swing trainer. Owned by more than half a million amateur golfers and thousands of professionals, the GolferDoc is easy-to-use. Practice in your living room or on the driving range and start seeing results. If the patented dual-hinge mechanism folds, or “breaks”, you still have some work to do. But, if you can swing the club without breaking it, you'll know you're swinging correctly. Not only does the club help eliminate your slice or hook, but it lets you hit longer, more accurate shots time after time on any golf course. Improve all aspects of your swing, from your takeaway to your downswing to your follow-through with this golf tool, no coach necessary. The more you practice, the more you'll develop the muscle memory necessary to produce a perfectly repeated swing regardless of your chosen club. The hinged clubline is the signature of GolferDoc and has been since the first one was developed in the 1980's. As technology has evolved so has the hinge and it is now better than ever! The GolferDoc DualHinge is the #1 swing diagnostic and training tool. Learn to swing on path and control your clubface to start hitting consistent, on-target shots with the GolferDoc DualHinge 5 Iron golf club.