Copper Creek E-Series door knobs first-class value. These locksets are to the highest standards using the finest materials obtainable. They are tested to meet the toughest federal building codes for recent construction. These door knobs feature massive brass cylinders -LRB- when keyed -RRB-, rhythm corner adaptable latches that ill temper most doors, nickel plated bolts, alignment adapters for easygoing installation, cosmetic rosettes, and a abundant finish. E-Series Knobs are basic for most residential construction and meets ANSI/BHMA Grade-3. P-Series Knobs a small lifetime robotlike warranty and 10 year finish warranty.