No, Schlage keys will not work in a Kwikset lock, and conversely, Kwikset keys will not fit into a Schlage cylinder. Schlage locks use a standard C keyway profile with narrower, distinct pin chambers, while Kwikset locks utilize a KW1 keyway profile with wider plug openings and different internal tumbler dimensions. Because their key blade thicknesses, cross-sections, and spacing do not match, a key from one brand cannot physically slide into or operate the mechanism of the other.
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