The heavy-duty steel X3 ground plate is used for heavy resistance band exercises that require an anchor point for the resistance bands, such as resistance band bar squats or as a resistance band curl bar. The X3 ground plate gives you a wider base to loop the bands under so that the bands are pulling up directly against your feet for proper support. Made from solid steel, it provides a strong resistance band platform for full body exercises. See how with X3 bar and ground plate protect your joints