Ultra Hardware, 43755, Stainless Steel Finish, Grade 2 Heavy Duty Double Cylinder Commercial Deadbolt Double Sided Lock. Finish: Stainless Steel. Type: Commercial. Grade: 2. Cylinder: Double, Keyed on both Sides. Keyed Different. Series: 9800. Keyway: SC4. Latch: 2-3/4" Backset / Square Bolt. 6 pin solid brass cylinder. Removable & rekeyable 6 pin solid brass cylinder for rekeying. Fits wood or metal doors from 1-3/8" to 1-3/4" thick. Heavy duty solid brass tubular construction with heavy gauge steel reinforced plates. Full 1" throw. Heavy gauge strike plates and hardened steel core bar. Tapered collar. This lock Meets Grade 2 Specifications and is UL certified.