Used on the following models: For Werner 1FCF6, 1FCF7, 3W139, 3W140, 41D257, 41D258, 4GNK9, 4XN89, 4XP01, and more. For Keller: 3552, 5120, L-2324-20, L-2324-16, 3520 and so on. 【Unique Designs】The 29-1 lock flipper kit for werner ladder is designed for aluminum extension ladder locks.
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