So the inside handle has 3 places for an inside lock depending on your configuration. Well, 2 out of 3 is useless because if your knobs aren't aligned to the ONLY configuration where 2 screws fit together, it's useless. This only applies if you are using a key/tumbler. That's the only reason I bought these! I installed a dozen of these things and this was the most frustrating. Had to throw away the key and use the keyless pen which luckily came with the kit (I wonder why lol)
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