Copper Creek E-Series door knobs first-class value. These locksets are to the highest standards using the finest materials acquirable. They are tested to meet the toughest nationalist building codes for fresh construction. These door knobs feature jelled brass cylinders -LRB- when keyed -RRB-, cumuliform corner adaptable latches that ready most doors, nickel plated bolts, alignment adapters for simple installation, cosmetic rosettes and a wealthy finish. E-Series Knobs are standardized replacement for most residential construction and meets ANSI/BHMA Grade-3 P-Series Knobs a controlled lifetime automatic warranty and 10 year finish warranty.