Featuring a Limited Lifetime Guarantee, Defiant meets or exceeds ANSI Grade 3 Standards for residential use. This lock features a radius latch with an adjustable backset and optional drive-in feature. Defiant keyed locks can be re-keyed to fit your existing KW1 keyway. The Powder coated finish will provide years of durability. When used as a replacement lock only a screwdriver is need to make installation a snap.