Norton Door Controls presents a full line of door closers engineered for exceptional performance and durability. The 8501690 model features an adjustable surface mount design with a dark bronze cast aluminum body and a full cover for a polished appearance. This rack and pinion closer integrates valve-controlled backcheck, allowing for precise control of latch, sweep, and backcheck speeds. Certified to ANSI/BHMA A156.4 Grade 1 standards and tested beyond 25 million cycles, it ensures long-lasting, reliable operation. The non-handed design and inclusion of sex nuts simplify installation and versatility in commercial applications.