About this item Hooks are for use with standard 1-1 1/2″ diameter chin-up bars; People with legs should wear boots or use extra padding for secure fit. Suitable for people who have the basics of up and down down training.Those who do not have the basics of upside down must be assisted by others and these people may feel ankles hurt. 150KG weight capacity; Comfortable padded sides for contoured fit around your ankles; Sturdy hooks fit over bars and buckles close the pads. Separate compressed spinal discs and stretch muscles; Work out abs for more effective exercises. Made of stainless steel NBR material.