Abstract: Disclosed is a system which prevents weights from being misplaced within an exercise environment. The system prevents a weight from being placed in an incorrect position of a weight rack. By using a keyed weight and weight rack the user is required to place the weight correctly in order for the weight to properly seat on the weight rack. The weights are keyed in such a way as to allow use on any properly sized dumbbell or barbell whilst limiting placement on an incorrect weight rack. This system eliminates the need to sort weights and therefore drastically reduces the amount of effort required to maintain the weight system in addition to reducing the time which is required to locate a specific weight plate.