The 28-11 Rung Lock Kit for Werner Aluminum Extension Ladder Locks by LanKstet is a metal accessory designed to secure ladder rungs when not in use. Made of durable metal and weighing 181 grams, this kit includes everything needed for easy installation on a Werner aluminum extension ladder. The package weighs 499 grams and measures 252 x 158 x 60 inches in length, width, and height, respectively. Ideal for industrial and commercial settings, this product enhances safety and stability on ladder rungs.