A Micro Gainz GymPin helps you add incremental weight to your weight machines. This is done by sliding your Gympin into a weight stack on a weight machine. Then you can add any Olympic plate to the pin to add additional weight. So now you do not have to worry about those 10-15lb jumps that are typical on weight machines. With the GymPin you can make 2.5lb jumps or 5lb jumps etc. It is a great way to break a plateau on your weight machine!