The Norton 1601690 is an adjustable medium duty surface-mounted door closer featuring sex nuts and a dark bronze finish. Engineered by Norton Rixson, it delivers reliable performance through a refined rack and pinion mechanism and hydraulic valve-controlled backcheck. This non-handed closer offers corrosion resistance and is equipped with adjustable backcheck and speed controls for precise operation. Certified to ANSI/BHMA A156.4 Grade 1 standards, it exceeds 25 million cycles in durability tests and comes with a limited 15-year warranty, making it ideal for demanding commercial applications.