FOOT Strap 3-Ring SOLD SINGLE for Cable Extension Machines . Power Sports Foot Strap Designed to be worn with shoes, 3-ring Ankle Strap has 1 fixed ring under the foot, 1 swivel ring on top of the foot, and 1 swivel ring at the back of the foot allowing for multi-angle resistance training.Glute, Hip, Leg and Core Exercises,GREAT for Strengthening; Lifting, Shaping, Toning and Building Your Booty, Hips (Adductors/Abductors), Legs, upper body and Core,Ultimate Brazilian Butt Lift Workout for Women – Shape and tone that booty