The Uni-Lock Ringlock stairway system is like no other stairway on the market today. It is easy to assemble, durable and reliable. All of our stairway components are hot-dip galvanized for durability. Our stairway stringer is the most versatile on the market and can be used as either a left or right stringer. Swivels on the ends of the stairway stringer allow for quick and easy alignment. Our stairway treads are 3' wide and feature non-slip, self-cleaning treads that install quickly over the stairway stringer nodes.