Z Factor Perfect Putting Machine Each Z Factor Perfect Putting Machine accommodates an optional clip on, rear-mounted alignment laser that illuminates the target line. The line projected by the laser will teach your eyes to identify the target line and help you aim your putter properly at address. The Z Factor's parallel design aids in setting the feet and shoulders up square to the target line. A numbered stance indicator system allows the user to replicate their stance width and position on every stroke. A ball position indicator allows the user to place the ball in the exact same location on each putt. Having consistent ball position is an important aspect of a repeating stroke. The Z Factor Perfect Putting Machine is very easy to use. Simply attach your putter to the magnetic carriage and the machine will guide you through the perfect stroke. For putters with synthetic faces, small steel plates are attached to the putter's heel and toe using foam tape. These adapters are then removed when the practice session is over The Z Factor Perfect Putting Machine takes about 5 minutes to set up initially. Once it is set up, it is ready to use at your convenience.