If you are using Lishi Tools, this video is an advisory on purchasing the appropriate tools for work. If you are working on a KW1 keyway you can only use the KW1 Lishi tool, KW5 Lishi tool will not work accordingly. But if you are using a KW1 Lishi In a KW5 keyway, it will work as long as the Cylinder only has 5 pins in it.
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