Corbin Russwin CK4457-GWC-630-KR Grade 2 Storeroom is an outstanding combination of value and performance. Ideal for quality residential and light commercial buildings like apartments, motels, and offices. Precision manufactured mechanisms, zinc dichromate for corrosion resistance, and Stainless steel latch bolt for long life. ANSI/BHMA Certified and meets A156.2 Series 4000, Grade 2. Federal, Meets FF-H-106C. Listed for A label and lesser class single doors, 4' x 8'. Letter F and UL symbol on latch front indicate listing. One-year limited warranty.