Ensure your shower doors are working perfectly with this shower door bottom guide and retainer pin. It helps retain shower door panels to the existing track, and can be used to replace existing or broken guides. It fits old style “kinked†shower doors and is 2†long by 9/16†wide. Made of white nylon plastic, this shower door guide is strong, durable and made to last. Plus, installation is quick and easy! Everything needed is included, including the nylon locking key and hook style guide tip.