Reinforces and repairs door edge and assists in preventing forced entry. Used on wood or metal doors with mortise or drive-in latches. Accommodates key-in-knob locksets and deadbolts or combination locksets. Easy to install. Bore 2-1/8", backset 2-3/8". Overall size 3-7/8"W x 10-7/8"H. Includes solid brass door channel, (4) #10 x 1" combo screws, (4) #10-32 hex nuts, (4) #8 x 5/8" Phillips truss head screws. Prefix U on factory number denotes new Defender Security packaging.