The Booster"s 9 inch wide enclosed ladder features innovative hand rail for safe, easy ascent to platform; folds down after entry to allow full platform use. Flip up trap door allows easy access while maintain full use of large platform. For use with any Big Game Treestands Box Blind. The platform is 48 inches square. The entrance is 20 inches by 20 inches, with a flip up trap door for easy entry, hand rail included for safety. Climbing steps are 9 inches wide. Platform supports included, eight brackets on platform allow user to secure blind or surround. Their are eight corner brackets included to aid user in building their own plywood surround.