The DARD (Dynamic Axial Resistance Device) develops ankle and lower leg strength, stamina, and stability. Excellent tool for overcoming lower leg muscular imbalances contributing to shin splints. Accommodates all 1" diameter weight plates. Resistance can be varied in small increments by changing the size of the plates commonly used for weight training with the adaptor. Moving the weight disc toward or away from the feet in any of 5 pre-set levels also increases or decreases resistance. The DARD now includes the Olympic weight plate adapter kit. Weights are NOT included.