Copper Creek M-Series Levers provide excellent value. These locksets are manufactured to the highest standards using the finest materials available. They are time tested to meet the toughest national building codes for new construction. These knobs feature round corner adjustable latches that fit most doors, nickel plated bolts, easy installation and a rich finish. M-Series levers are standard replacement for most residential construction, meet ANSI/BHMA Grade-3 and carry a limited lifetime mechanical warranty and 5 year finish warranty.