Chest Expander is designed to develop strength in shoulders chest & arms. York Spring Chest Expander with heavy duty plated springs entirely adjustable from one to five levels of resistance. The Chest Expander consists of 5 detachable springs allowing the resistance levels to be adjusted. The range of resistance allows for both body toning & if required building muscle & strength. They are an old time favourite of boxers as they also help develop explosive speed. Chest expanders are on