DORMA Architectural Hardware's C500 Series Locksets feature a high-performance cylindrical chassis for applications requiring ANSI A156.2 Series 4000 Grade 2 products. The key-in-lever locksets offer two ADA-compliant lever designs (radiused and angular), four standard finishes and two optional finishes to meet a range of aesthetic demands and applications. They are available in 10 different lock functions to accommodate an assortment of privacy, security and access needs. Constructed of steel, stainless steel, and precision castings for strength, durability and corrosion resistance, the locksets include special auxiliary support springs to ensure smooth operation and long life.