The Bag Boy Backbone features an oversized and durable polypropylene top cap for maximum club protection while transporting them in your Bay Boy travel cover. The lightweight aluminum tubing won't add weight to your travel bag. The Backbone also offers precision-lock, spring-loaded adjustment and a rubber foot cap on the bottom. Three telescoping sections easily collapse and expand for preferred protection length, adjusts up to 54" and collapses to 23.25" for easy storage. Oversize and durable polypropylene top cap for maximum club protection. Lightweight aluminum tubing won't add weight to your travel bag. Precision lock spring loaded adjustment. Rubber foot cap on the bottom.