Corbin Russwin CL3357-AZD-625-CL6 Grade 1 Storeroom is a Grade 1 cylindrical lockset manufactured with the highest quality materials to ensure strength, durability and quiet operation, and subtly complements any high-use commercial, industrial, and institutional application. Engineered to meet today's increased security needs, the CL3300 series offers the Lever Release design for vandal resistance, allowing the outside lever to rotate when in the locked position. Independent return springs prevent lever sag, and EZ-Install components significantly reduce installation time. ANSI/BHMA Certified A156.2 Series 4000, Grade 1. Meets A117.1 Accessibility Code. Seven-year limited warranty.