The 1-piece Rock N Roller carpeted plywood shelf features tube support beams. The shelf is easy to attach to the handles of your R2 Rock N Roller Cart and you can remove it instantly. Create double the storage space for your gear as you transport it from the car to the venue and back. This carpeted shelf not only prevents the loss of loose gear items, it also protects the edges of your favorite gear. If your gear load is increasing with your talent, you"ll benefit greatly by doubling the amount of transport space you have on your Rock N Roller R2 Cart.Newer Rock N Roller carts come standard with handles that already have pre-drilled attachment holes. Older carts may not have pre-drilled handle holes. You can upgrade an older cart by purchasing perforated handles from Rock N Roller.