The GoPro system saves time, money, and headaches. It makes it possible for carpenters, builders and DIY of all skill levels to take on the building of stairs on-site. The secret to the system is the patented pre-stamped measurements on each bracket, which allow the builder to screw the brackets correctly into the wood stringer the first time and without constant measuring or marking. The brackets meet all state building codes and accommodate all rises and runs. The brackets are made from 16-gauge G-185 hot-dipped galvanized steel and can be used inside or outside. The brackets can be used with all types of wood, including treated and artificial wood. The GoPro system saves wood, you can use a 2 x 8 or even a 2 x 6 instead of a 2 x 12. There is minimal cutting of wood, or multiple measuring and marking as you screw in the premarked brackets. It is virtually mistake-proof. There is considerably less chance of squeaking than with conventional stairs. The universal stair bracket is more stable than conventional stringers. And, weight tests conducted by a major North American university demonstrated that our system far exceeded the 300 lb. minimum required in the U.S. For installation instruction go to www.goproconstruction.com. You will also need the Left Stair Bracket (USBL) and Base (SBASE) to complete the system.